Apple Watch Ultra 3 not consistently tracking daytime naps

I have owned the Apple Watch Ultra 3 since I got it in late September and I do love it so far but, there are some bugs I have to mention. I love the ability to track how much sleep I get, but sometimes I don't get enough sleep at night and have a nap during the day time.

It's happened 3 or 4 times that I have had a nap during the day time ever since I first got the watch where I would wake up and look at the Health app on my iPhone and there would be no data what so ever on the sleep that I got during the day. If there is an easy fix for this please let me know.

I have noticed this watch actually track my sleep during the day before so I know it does work. I always make sure I only charge this watch when I am awake and next to my computer since I cannot charge it while I'm sleeping.