Apple Watch display problem
Why does my watch go dark when I move my arm?
Apple Watch Series 6
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User profile for user:
jmarse1
User level:
Community Specialist
Hi Boomerfan1970,
We'll be glad to address this with you further. This may be related to the Wake on Wrist Raise feature.
"If you don’t want your Apple Watch to wake when you raise your wrist or turn the Digital Crown, open the Settings app 
on your Apple Watch, go to Display & Brightness, then turn off Wake on Wrist Raise and Wake On Crown Rotation."
More information on this can be found in Turn on and wake Apple Watch - Apple Support
Cheers.