I updated to 5.3 today and none of my keybinds related to animation work. I use (.) for previous keyframe, (,) for next keyframe, (home) for first frame, (end) for last frame and f7-8-9 create-clone-remove keyframe. but none of them work currently, I removed and reattached all but still not working.
I just updated today and I’m having the same issues 
next and previous frame shortcuts aren’t working at all even after resetting them
This has been mentioned recently, for the Linux appimage, so something strange is happening:
Krita Previous & Next Frame Shortcuts don't work on Krita 6.0 and 5.3 AppImage
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