onDragEnd not fired on apple maps

**Describe the bug**
On apple maps, `onDragEnd` is not fired. I tried `consumeTapEvents` true and false, no change.

**To Reproduce**
```
Marker(
markerId: MarkerId('marker_${e.uuid}'),
position: e.position.latLng,
draggable: true,
onDragEnd: _mapTap,
// consumeTapEvents: true,
),
```
1. hold down marker
2. move it around
3. let go
4. event is not fired

**Expected behavior**
`_mapTap` should be called but isnt

**Screenshots**
–

**Smartphone (please complete the following information):**
- Device: iPhone 12 pro
- Version 1.0.2

**flutter doctor**
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.5.0, on macOS 11.4 20F71 darwin-x64, locale en-US)
[✗] Android toolchain - develop for Android devices
✗ Unable to locate Android SDK.
Install Android Studio from: https://developer.android.com/studio/index.html
On first launch it will assist you in installing the Android SDK components.
(or visit https://flutter.dev/docs/get-started/install/macos#android-setup for detailed instructions).
If the Android SDK has been installed to a custom location, please use
`flutter config --android-sdk` to update to that location.

[✓] Xcode - develop for iOS and macOS
[✓] Chrome - develop for the web
[!] Android Studio (not installed)
[✓] VS Code (version 1.60.1)
[✓] Connected device (2 available)
! Error: i is busy: Copying cache files from device. Xcode will continue when i is finished. (code -10)

! Doctor found issues in 2 categories.