Hi! Thanks a ton for reporting this, and for the feedback! Very helpful.
I did not know about the Itch app, I just tried it and was able to get the problem too, could no longer type in text fields. It's super confusing, but looks like a focus issue, I only get it after a text popup displays (clicking on the "?" buttons for example, or the greyed out "local" option). And clicking outside of the app (on the desktop, essentially removing focus) and back in it fixes everything for me.
Good suggestions! Feel free to contact me on Discord or Telegram, could be very helpful! Otherwise I will see what I can do!