Friended an opponent, opened chat to send a GG. Keyboard comes up but no chat window. Sent a message (I think? No way to confirm). Keyboard could not be dismissed by swiping, tapping on background etc. Only way out was to quit the app.
After reloading and attempting a similar chat, got the same result.
(On an unrelated note, loading to the main/home screen, the central buttons are often ghosted and I need to navigate to the collection or the shop and back before they are functional.)