Apple Watch Ultra 3 Action Button errors with WatchOS 26

Ultra 3 Action Button Error: I upgraded from an Ultra 2 to Ultra 3 when Ultra 3 was first released, and of course WatchOS went to 26 at that same time and have been experiencing random Action Button errors ever since. Never had these issues on my Ultra 2, and at this point I've had each watch for about the same length of time. Yes I can hard reboot the watch to suppress the issue, but that's not something I want to add to my daily routine. Do we have a hardware issue, or WatchOS issue?