Yes, this is extremely annoying. It seems to happens as the text approaches two lines. It seems to be updating prematurely (with the previous text) at that point, instead of waiting for the user to finish typing so it can update with the new text.
Just to check, is this happening on the latest version of the iOS app as well? (There was a similar bug in regards to text loss that was happening before version 3.57.0)
For the keyboard changing, that’s definitely frustrating too. I think it would be worth revisiting how the app handles resetting keyboard and focus after every 2 seconds of inactivity, while saving state.