Wrist Temperature tracking on Apple Watch Series 8 is unreliable

Hey,

I'm not happy with the reliability of the Apple Watch Series 8 Wrist Temperature Tracking Feature.

Quite frequently Data is missing, while the Apple Watch was worn throughout. See screenshot.

I have looked into

Wearing your Apple Watch – Apple Support (UK)

and tried multiple bands and adjusting the bands to fit tightly to the maximum.

Apple Watch was also fully charged most of the time before sleep.

Sleep focus and schedule was also turned on all the time.

Looking at the data there also seems to be no pattern etc.

(Image taken at the 16.10.22)