maps: [iOS] onRegionDidChange is not called if you swipe and stop the animation

Describe the bug This happens on iOS (both device and simulator). If you swipe/pan the map in one big motion, and then stop it by pressing down before the animation finishes, onRegionDidChange is not called.

To Reproduce

1. Swipe the map
2. Stop the animation before it finishes by clicking/pressing on the map to hold it
3. Let go (without moving the map)
4. Notice that onRegionDidChange is not called (the coordinates from the example is not updated)

I’ve included an example screen here where I print out the coordinates after region changes. Notice that the coordinates do not update if you follow the above reproduction steps:

Example:

import React, {useState} from 'react';
import {View, Text} from 'react-native';
import MapboxGL from '@react-native-mapbox-gl/maps';

const BugReportExample = () => {
  const [region, setRegion] = useState();
  return (
    <View style={{flex: 1}}>
      <MapboxGL.MapView style={{flex: 1}} onRegionDidChange={setRegion}>
        <MapboxGL.Camera
          centerCoordinate={[-74.00597, 40.71427]}
          zoomLevel={14}
        />
      </MapboxGL.MapView>
      <View
        style={{
          position: 'absolute',
          bottom: 50,
          width: '100%',
          backgroundColor: 'white',
        }}>
        <Text>
          {region
            ? region.geometry.coordinates[1] +
              ', ' +
              region.geometry.coordinates[0]
            : 'No region'}{' '}
        </Text>
      </View>
    </View>
  );
};
export default BugReportExample;

Expected behavior onDidRegionChange should be called. This works fine on Android.

Screenshots In the example, if you move the region normally the coordinates in the lower white box will be updated.

But if you swipe fast and then press to hold, as noted in the reproduction, the coordinates will not update:

Versions (please complete the following information):

• Platform: iOS
• Device: iPhone XS
• Emulator/ Simulator: yes
• OS: iOS 13.6.1
• react-native-mapbox-gl Version: 8.1.0-rc.2
• React Native Version: 0.63.2

Additional context None