Jumping cursor on mobile

[lszabolcs]

Issue description

Unexpected cursor jumps happens when you tap in the editor to move the cursor.

Environment:

• Android 13
• Gboard
• Chrome

I could reproduce the problem on my Google Pixel 4a and also on several other android devices on BrowserStack.

[lszabolcs]

The problem is caused by Gboard's spellchecking, but we eventually switched to another library.