I’m having the same problem. Cannot click on “A” “1” “2” “3” “S” any of the keys on the left of the keyboard. See picture. I tried closing and reopening the app, rebooting my ipad, and even uninstalling/re-installing the Cubase IC pro app (no available update as of 4/28/2020). Still no luck.
Support team, please advise, thx!
DAW: Cubase Pro 10.5.5. Build 1
Ipad pro 10.5-inch: iOS 13.3