Apple Watch not working correctly for sleep tracking anymore.

I have a series 6 watch. Starting recently, when I set my sleep schedule, and I get up for a few minutes during the night, it records my time, and then stops tracking any sleep data when I go back to bed, even though my sleep schedule is still active. The way it has always worked before, it would not record the final sleep numbers until my sleep schedule was ended. Also, sometimes now if I delete the schedule because I know it won't track anymore, and than start a new sleep schedule for when I go back to bed, it will record that 2nd sleep, and add the two times, but most of the time it will not record anything. The software is up to date for both my phone and watch, I have powered off and on both my watch and phone, made sure the watch is attached to my wrist properly, and the watch and phone are properly charged. This may have started when I upgraded from my iPhone 12 Pro to the 16 Pro, but not sure. I don't know how that would cause this, so I doubt that is the problem. I didn't keep close enough track to when this issue started, but it's been at least a month. I talked with Apple, and they weren't any help .Please help.