Pulling this out of #5963 in order to move that PR forward.

I have not managed to reproduce this longpress issue myself

Test start-of-sentence detection

• ANDROID: FAILED Longpress not working.

  • In-app:

    • It should set the keyboard to the Shift layer at the start of a text field, after full stop (.), exclamation (!) or question mark (?) and one or spaces (e.g. . ).

      OK, but the longpress keys are not working. The subkeys are not popped up.

    Screen.Recording.2021-12-20.at.9.10.52.AM.mov

    • It should keep the keyboard in the numeric layer after typing a digit, but move back to base layer for all other symbols.

      Working as expected. Note also that the longpress keys on this layer are not working. Subkeys don't pop up!

  • As a system keyboard:

    • It should set the keyboard to the Shift layer at the start of a text field, after full stop (.), exclamation (!) or question mark (?) and one or spaces (e.g. . ).

      The same behavior as in-app. The long press doesn't work either.

    Screen.Recording.2021-12-20.at.9.21.25.AM.mov

Originally posted by @MakaraSok in #5963 (comment)