The zoom/pan issue is, I cannot zoom/pan canvas with my mouse wheel/middle mouse button. But the mouse wheel works on other part like scroll the brush list. And the tablet pen(has a button register as middle mouse button) still not work. Ctrl + drag to zoom mode not works too. These hotkey is set correctly, and in most contition it works again when I restart Krita.
About the reproduce: most time is I minimize the krita or just focus on other app window, then switch back to krita, then it has some chance to trigger the bug.
Some other post related to this: