We're sorry for the trouble. Which Operating system you are on now (Windows Or MacOS)? Could you please try reset Photoshop preferences back to defaults and check if that helps to resolve the shortcut issue. Here's the article for the steps:
Resetting the preferences seems to be Adobe's default answer for all of PhotoShops's problems. Going through and setting up my prefernces again is a pain and how long will that last before something else goes wrong. No reflection on you, but what I would really hope is that Adobe works on fixing its long list of problems.