diff --git a/CHANGELOG.md b/CHANGELOG.md
index e0cb67ed..59b1de3a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+# [UNRELEASED]
+
+## Fixed
+
+- Fix a bug where some points from Owntracks were not being processed correctly which prevented import from being created. #1745
+
 # [0.32.0] - 2025-09-13
 
 ## Fixed
diff --git a/app/controllers/api/v1/maps/hexagons_controller.rb b/app/controllers/api/v1/maps/hexagons_controller.rb
index 425d688c..58d03c6b 100644
--- a/app/controllers/api/v1/maps/hexagons_controller.rb
+++ b/app/controllers/api/v1/maps/hexagons_controller.rb
@@ -49,8 +49,12 @@ class Api::V1::Maps::HexagonsController < ApiController
     return render json: { error: 'No date range specified' }, status: :bad_request unless @start_date && @end_date
 
     # Convert dates to timestamps (handle both string and timestamp formats)
-    start_timestamp = coerce_date(@start_date)
-    end_timestamp = coerce_date(@end_date)
+    begin
+      start_timestamp = coerce_date(@start_date)
+      end_timestamp = coerce_date(@end_date)
+    rescue ArgumentError => e
+      return render json: { error: e.message }, status: :bad_request
+    end
 
     points_relation = @target_user.points.where(timestamp: start_timestamp..end_timestamp)
     point_count = points_relation.count
@@ -119,22 +123,36 @@ class Api::V1::Maps::HexagonsController < ApiController
 
   def generate_hexagon_polygon(center_lng, center_lat, size_meters)
     # Generate hexagon vertices around center point
-    # This is a simplified hexagon generation - for production you might want more precise calculations
-    earth_radius = 6_371_000 # meters
-    angular_size = size_meters / earth_radius
+    # PostGIS ST_HexagonGrid uses size_meters as the edge-to-edge distance (width/flat-to-flat)
+    # For a regular hexagon with width = size_meters:
+    # - Width (edge to edge) = size_meters
+    # - Radius (center to vertex) = width / √3 ≈ size_meters * 0.577
+    # - Edge length ≈ radius ≈ size_meters * 0.577
+
+    radius_meters = size_meters / Math.sqrt(2.7) # Convert width to radius
+
+    # Convert meter radius to degrees (rough approximation)
+    # 1 degree latitude ≈ 111,111 meters
+    # 1 degree longitude ≈ 111,111 * cos(latitude) meters
+    lat_degree_in_meters = 111_111.0
+    lng_degree_in_meters = lat_degree_in_meters * Math.cos(center_lat * Math::PI / 180)
+
+    radius_lat_degrees = radius_meters / lat_degree_in_meters
+    radius_lng_degrees = radius_meters / lng_degree_in_meters
 
     vertices = []
     6.times do |i|
-      angle = (i * 60) * Math::PI / 180 # 60 degrees between vertices
+      # Calculate angle for each vertex (60 degrees apart, starting from 0)
+      angle = (i * 60) * Math::PI / 180
 
-      # Calculate offset in degrees (rough approximation)
-      lat_offset = angular_size * Math.cos(angle) * 180 / Math::PI
-      lng_offset = angular_size * Math.sin(angle) * 180 / Math::PI / Math.cos(center_lat * Math::PI / 180)
+      # Calculate vertex position
+      lat_offset = radius_lat_degrees * Math.sin(angle)
+      lng_offset = radius_lng_degrees * Math.cos(angle)
 
       vertices << [center_lng + lng_offset, center_lat + lat_offset]
     end
 
-    # Close the polygon
+    # Close the polygon by adding the first vertex at the end
     vertices << vertices.first
 
     {
@@ -214,5 +232,8 @@ class Api::V1::Maps::HexagonsController < ApiController
     else
       param.to_i
     end
+  rescue ArgumentError => e
+    Rails.logger.error "Invalid date format: #{param} - #{e.message}"
+    raise ArgumentError, "Invalid date format: #{param}"
   end
 end
diff --git a/app/javascript/controllers/public_stat_map_controller.js b/app/javascript/controllers/public_stat_map_controller.js
index 348d4abb..2e2acb12 100644
--- a/app/javascript/controllers/public_stat_map_controller.js
+++ b/app/javascript/controllers/public_stat_map_controller.js
@@ -297,4 +297,5 @@ export default class extends BaseController {
       layer.setStyle(layer._originalStyle);
     }
   }
+
 }
diff --git a/app/services/own_tracks/importer.rb b/app/services/own_tracks/importer.rb
index 70fcf2e4..33a6bae4 100644
--- a/app/services/own_tracks/importer.rb
+++ b/app/services/own_tracks/importer.rb
@@ -17,6 +17,8 @@ class OwnTracks::Importer
     parsed_data = OwnTracks::RecParser.new(file_content).call
 
     points_data = parsed_data.map do |point|
+      next unless point_valid?(point)
+
       OwnTracks::Params.new(point).call.merge(
         import_id: import.id,
         user_id: user_id,
@@ -31,7 +33,7 @@ class OwnTracks::Importer
   private
 
   def bulk_insert_points(batch)
-    unique_batch = batch.uniq { |record| [record[:lonlat], record[:timestamp], record[:user_id]] }
+    unique_batch = batch.compact.uniq { |record| [record[:lonlat], record[:timestamp], record[:user_id]] }
 
     # rubocop:disable Rails/SkipsModelValidations
     Point.upsert_all(
@@ -42,6 +44,8 @@ class OwnTracks::Importer
     )
     # rubocop:enable Rails/SkipsModelValidations
   rescue StandardError => e
+    ExceptionReporter.call(e, "Failed to bulk insert OwnTracks points for user #{user_id}: #{e.message}")
+
     create_notification("Failed to process OwnTracks data: #{e.message}")
   end
 
@@ -53,4 +57,10 @@ class OwnTracks::Importer
       kind: :error
     )
   end
+
+  def point_valid?(point)
+    point['lat'].present? &&
+      point['lon'].present? &&
+      point['tst'].present?
+  end
 end
diff --git a/spec/requests/api/v1/maps/hexagons_spec.rb b/spec/requests/api/v1/maps/hexagons_spec.rb
index f3750cf8..5879a368 100644
--- a/spec/requests/api/v1/maps/hexagons_spec.rb
+++ b/spec/requests/api/v1/maps/hexagons_spec.rb
@@ -76,6 +76,97 @@ RSpec.describe 'Api::V1::Maps::Hexagons', type: :request do
 
         expect(response).to have_http_status(:success)
       end
+
+      context 'error handling' do
+        it 'handles BoundingBoxTooLargeError' do
+          allow_any_instance_of(Maps::HexagonGrid).to receive(:call)
+            .and_raise(Maps::HexagonGrid::BoundingBoxTooLargeError, 'Bounding box too large')
+
+          get '/api/v1/maps/hexagons', params: valid_params, headers: headers
+
+          expect(response).to have_http_status(:bad_request)
+
+          json_response = JSON.parse(response.body)
+          expect(json_response['error']).to eq('Bounding box too large')
+        end
+
+        it 'handles InvalidCoordinatesError' do
+          allow_any_instance_of(Maps::HexagonGrid).to receive(:call)
+            .and_raise(Maps::HexagonGrid::InvalidCoordinatesError, 'Invalid coordinates')
+
+          get '/api/v1/maps/hexagons', params: valid_params, headers: headers
+
+          expect(response).to have_http_status(:bad_request)
+
+          json_response = JSON.parse(response.body)
+          expect(json_response['error']).to eq('Invalid coordinates')
+        end
+
+        it 'handles PostGISError' do
+          allow_any_instance_of(Maps::HexagonGrid).to receive(:call)
+            .and_raise(Maps::HexagonGrid::PostGISError, 'PostGIS error')
+
+          get '/api/v1/maps/hexagons', params: valid_params, headers: headers
+
+          expect(response).to have_http_status(:internal_server_error)
+
+          json_response = JSON.parse(response.body)
+          expect(json_response['error']).to eq('PostGIS error')
+        end
+
+        it 'handles generic StandardError' do
+          allow_any_instance_of(Maps::HexagonGrid).to receive(:call)
+            .and_raise(StandardError, 'Unexpected error')
+
+          get '/api/v1/maps/hexagons', params: valid_params, headers: headers
+
+          expect(response).to have_http_status(:internal_server_error)
+
+          json_response = JSON.parse(response.body)
+          expect(json_response['error']).to eq('Failed to generate hexagon grid')
+        end
+      end
+
+      context 'with no data points' do
+        let(:empty_user) { create(:user) }
+        let(:empty_headers) { { 'Authorization' => "Bearer #{empty_user.api_key}" } }
+
+        it 'returns empty feature collection' do
+          get '/api/v1/maps/hexagons', params: valid_params, headers: empty_headers
+
+          expect(response).to have_http_status(:success)
+
+          json_response = JSON.parse(response.body)
+          expect(json_response['type']).to eq('FeatureCollection')
+          expect(json_response['features']).to be_empty
+        end
+      end
+
+      context 'with edge case coordinates' do
+        it 'handles coordinates at dateline' do
+          dateline_params = valid_params.merge(
+            min_lon: 179.0, max_lon: -179.0,
+            min_lat: -1.0, max_lat: 1.0
+          )
+
+          get '/api/v1/maps/hexagons', params: dateline_params, headers: headers
+
+          # Should either succeed or return appropriate error, not crash
+          expect([200, 400, 500]).to include(response.status)
+        end
+
+        it 'handles polar coordinates' do
+          polar_params = valid_params.merge(
+            min_lon: -180.0, max_lon: 180.0,
+            min_lat: 85.0, max_lat: 90.0
+          )
+
+          get '/api/v1/maps/hexagons', params: polar_params, headers: headers
+
+          # Should either succeed or return appropriate error, not crash
+          expect([200, 400, 500]).to include(response.status)
+        end
+      end
     end
 
     context 'with public sharing UUID' do
@@ -157,6 +248,88 @@ RSpec.describe 'Api::V1::Maps::Hexagons', type: :request do
           expect(json_response['error']).to eq('Shared stats not found or no longer available')
         end
       end
+
+      context 'with pre-calculated hexagon centers' do
+        let(:pre_calculated_centers) do
+          [
+            [-74.0, 40.7, 1_717_200_000, 1_717_203_600], # lng, lat, earliest, latest timestamps
+            [-74.01, 40.71, 1_717_210_000, 1_717_213_600],
+            [-74.02, 40.72, 1_717_220_000, 1_717_223_600]
+          ]
+        end
+        let(:stat) do
+          create(:stat, :with_sharing_enabled, user:, year: 2024, month: 6, hexagon_centers: pre_calculated_centers)
+        end
+
+        it 'uses pre-calculated hexagon centers instead of on-the-fly calculation' do
+          get '/api/v1/maps/hexagons', params: uuid_params
+
+          expect(response).to have_http_status(:success)
+
+          json_response = JSON.parse(response.body)
+          expect(json_response['type']).to eq('FeatureCollection')
+          expect(json_response['features'].length).to eq(3)
+          expect(json_response['metadata']['pre_calculated']).to be true
+          expect(json_response['metadata']['count']).to eq(3)
+
+          # Verify hexagon properties are generated correctly
+          feature = json_response['features'].first
+          expect(feature['type']).to eq('Feature')
+          expect(feature['geometry']['type']).to eq('Polygon')
+          expect(feature['geometry']['coordinates'].first).to be_an(Array)
+          expect(feature['geometry']['coordinates'].first.length).to eq(7) # 6 vertices + closing vertex
+
+          # Verify properties include timestamp data
+          expect(feature['properties']['earliest_point']).to be_present
+          expect(feature['properties']['latest_point']).to be_present
+          expect(feature['properties']['hex_size']).to eq(1000)
+        end
+
+        it 'generates proper hexagon polygons from centers' do
+          get '/api/v1/maps/hexagons', params: uuid_params
+
+          json_response = JSON.parse(response.body)
+          feature = json_response['features'].first
+          coordinates = feature['geometry']['coordinates'].first
+
+          # Verify hexagon has 6 unique vertices plus closing vertex
+          expect(coordinates.length).to eq(7)
+          expect(coordinates.first).to eq(coordinates.last) # Closed polygon
+          expect(coordinates.uniq.length).to eq(6) # 6 unique vertices
+
+          # Verify all vertices are different (not collapsed to a point)
+          coordinates[0..5].each_with_index do |vertex, i|
+            next_vertex = coordinates[(i + 1) % 6]
+            expect(vertex).not_to eq(next_vertex)
+          end
+        end
+      end
+
+      context 'with legacy area_too_large hexagon data' do
+        let(:stat) do
+          create(:stat, :with_sharing_enabled, user:, year: 2024, month: 6,
+                 hexagon_centers: { 'area_too_large' => true })
+        end
+
+        before do
+          # Create points so that the service can potentially succeed
+          5.times do |i|
+            create(:point,
+                   user:,
+                   latitude: 40.7 + (i * 0.001),
+                   longitude: -74.0 + (i * 0.001),
+                   timestamp: Time.new(2024, 6, 15, 12, i).to_i)
+          end
+        end
+
+        it 'handles legacy area_too_large flag gracefully' do
+          get '/api/v1/maps/hexagons', params: uuid_params
+
+          # The endpoint should handle the legacy data gracefully and not crash
+          # We're primarily testing that the condition `@stat&.hexagon_centers&.dig('area_too_large')` is covered
+          expect([200, 400, 500]).to include(response.status)
+        end
+      end
     end
 
     context 'without authentication' do
@@ -220,6 +393,59 @@ RSpec.describe 'Api::V1::Maps::Hexagons', type: :request do
         expect(json_response['error']).to eq('No data found for the specified date range')
         expect(json_response['point_count']).to eq(0)
       end
+
+      it 'requires date range parameters' do
+        get '/api/v1/maps/hexagons/bounds', headers: headers
+
+        expect(response).to have_http_status(:bad_request)
+
+        json_response = JSON.parse(response.body)
+        expect(json_response['error']).to eq('No date range specified')
+      end
+
+      it 'handles different timestamp formats' do
+        string_date_params = {
+          start_date: '2024-06-01T00:00:00Z',
+          end_date: '2024-06-30T23:59:59Z'
+        }
+
+        get '/api/v1/maps/hexagons/bounds', params: string_date_params, headers: headers
+
+        expect(response).to have_http_status(:success)
+
+        json_response = JSON.parse(response.body)
+        expect(json_response).to include('min_lat', 'max_lat', 'min_lng', 'max_lng', 'point_count')
+      end
+
+      it 'handles numeric string timestamp format' do
+        numeric_string_params = {
+          start_date: '1717200000', # June 1, 2024 in timestamp
+          end_date: '1719791999' # June 30, 2024 in timestamp
+        }
+
+        get '/api/v1/maps/hexagons/bounds', params: numeric_string_params, headers: headers
+
+        expect(response).to have_http_status(:success)
+
+        json_response = JSON.parse(response.body)
+        expect(json_response).to include('min_lat', 'max_lat', 'min_lng', 'max_lng', 'point_count')
+      end
+
+      context 'error handling' do
+        it 'handles invalid date format gracefully' do
+          invalid_date_params = {
+            start_date: 'invalid-date',
+            end_date: '2024-06-30T23:59:59Z'
+          }
+
+          get '/api/v1/maps/hexagons/bounds', params: invalid_date_params, headers: headers
+
+          expect(response).to have_http_status(:bad_request)
+
+          json_response = JSON.parse(response.body)
+          expect(json_response['error']).to include('Invalid date format')
+        end
+      end
     end
 
     context 'with public sharing UUID' do
diff --git a/spec/services/own_tracks/importer_spec.rb b/spec/services/own_tracks/importer_spec.rb
index 842883f8..cc9a9713 100644
--- a/spec/services/own_tracks/importer_spec.rb
+++ b/spec/services/own_tracks/importer_spec.rb
@@ -85,12 +85,6 @@ RSpec.describe OwnTracks::Importer do
       it 'creates points' do
         expect { parser }.to change { Point.count }.by(9)
       end
-
-      it 'correctly writes attributes' do
-        parser
-
-        point = Point.first
-      end
     end
   end
 end