Having same issue for last few days, after last SW update on my watches.
Galaxy Watch 42mm (SM-R810), SW version R810XXU1CSG4
Huawei P20 Pro, Android 9.0.0, Galaxy Watch plugin 2.2.05.19071241N
Do not know if it is connected, but same time the Sleep tracking is not working correctly - today reported 0 minutes of sleep, last few nights around 0.5-2 hour only per night. Before update all was ok.
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