The inserted text is not synced with the cursor location on Android Emulators

[EchoEllet]

Have you checked for an existing issue?

• I have searched the existing issues

Flutter Quill Version

10.8.5, 11.0.0-dev.19, 11.0.0-dev.20

Steps to Reproduce

1. Run the Android example app on an emulator.
2. Type any text anywhere.
3. Change the cursor location.
4. Type any text again.

FlutterQuillAndroidBug.mov

Also, repeat the same steps on a real device and the issue won't be reproduced:

FlutterQuillAndroidRealDevice.mov

Expected results

The inserted text should be at the correct location where the cursor is. The editor works as expected on a real device.

Actual results

The inserted text is inserted at the incorrect location, changing the cursor location and then typing text will insert the text at a previous location. The editor doesn't work as expected on an emulator.

Additional Context

Related Issues:

• revert!: magnifier #2413: At first, I assumed this was a regression after reverting the magnifier but this is not the case.
• Copy TapAndPanGestureRecognizer from TextField #2128 and [feature] : quill add magnifier #2026: Reverted by revert!: magnifier #2413 and still able to reproduce the issue, I'm not able to reproduce this issue on older versions even on an emulator.
• iOS editing cursor problem #2414

Issue reproduced on the 10.8.5, 11.0.0-dev.19, and the PR #2413 while revert the magnifier.

This is not a regression caused by v11 or #2413 (the magnifier revert).

FlutterQuillLatetStableBeforeRevert.mov

FlutterQuillLatestMasterBeforeRevert.mov

[CatHood0]

I'll check this too.

[CatHood0]

In the file raw_editor_text_input_client_mixin in updateEditingValue method that comes from TextInputClient is not working as expected:

@override
void updateEditingValue(TextEditingValue value) {
  // our implementation
}

It is passing a TextEditingValue that contains a TextSelection that is not synchronized with what comes from the QuillController. This could be the reason why when inserting text, suddenly the cursor is not where we expect.

I noticed by comparing the values ​​that the QuillController has, along with the _lastKnownRemoteTextEditingValue and the TextEditingValue that updateEditingValue gives us, and at least the first time, before the error occurs, _lastKnownRemoteTextEditingValue is correctly synchronized. However, after a few insertions it starts to fail and gives us values ​​that are out of sync with the current selection.

But... Why does this suddenly happen? Could it be a Flutter bug? Honestly, at this point i couldn't say.