Hello,
I saw that this issue was already logged with previous versions of the FW.
Yesterday I experienced the same issue.
I changed the parameters of a screen activity in GC before sleeping, the battery was 92%.
When I woke up (8 hours later) the battery was 72%.
I think the prolem with the synchronization between GC and the watch is still there (if it was the root cause).
Ususally the battery drops by 2%.
Anyone in my situation?