Hi! There is a lot of people having the same issue with the keyboard shortcuts. Adobe keeps giving nonsense solutions, like change your keyboard language, preferences reseting, update to last version, bla, bla, bla. People with MacOs and Windows are having this issue. It is clearly a problem in Photoshop code and Adobe has no clue what is it.
In my case I use Mac and after a while working in a photo ANY INPUT on the photo itself STOPS WORKING, with the keyboard or with the mouse, trying to change the tool, or any action which involves a change to be displayed doesn't work. But if I jump to another photo that I already had opened, everything works fine, until it stops to work. I have save, close and reopen the photo and it does work normaly.
I urge Adobe to solve it immediatily, we are wasting a lot of time because of this.