Type in answer not working

Cards of the ‘type in answer’ no longer display the box or keyboard to allow this. Instead they behave a simple basic cards. This has just started happening. I’ve check that the option in Preferences is disable and the app (iPhone) is up to date. Anybody else having this problem.

I can’t seem to reproduce this. Please double-check that ‘never type answer’ is turned off in preferences>review. If it is, try turning it on and then off again. If problems persist, please try restarting your device.