A couple of places to check that have impacted other users with the same issue:
- Do you have the latest driver for your tablet? Have you checked with their support?
- Are there any other applications interfering with the keys? Common culprits are browsers, browser extensions and anti-virus applications. Try rebooting and only open Photoshop and see if it is still an issue. Pay attention to the apps that auto-load as well.
Thank you for your answer!
I checked all of that and it's not happening as frequently anymore (which is definitely an improvement), but it is still happening (especially with the option-shortcut for the eye dropper). And does that mean I can't have any browsers open while using Photoshop?
It happens to me occasionally. It has for a long time, on several totally unrelated and differently configured systems. If there's a common element triggering it I have no idea what that could be.
Anyway, I discovered that if I press ctrl-alt-shift-K, to bring up the keyboard shortcuts, and then just dismiss with OK - that particular shortcut always seems to work, and kickstart it back into operation.
And does that mean I can't have any browsers open while using Photoshop?
It's probably not all the browsers—if you pay attention, you may be able to figure out which one is the issue, if that is, in fact, what is going on. And certainly glad to hear that it is happening less frequently. What about your tablet driver? Is it up to date?