I just bought a new Series 4 Apple Watch a few days ago and just recently updated to WatchOS 6. Now when charging it won't go past 87%. Any idea what's going on?
Had the same issue with the release of 5.2. Apple had to replace it but that could be a bug. I’d hold off on going to Apple for it unless you want to go back to watchOS 5 and see if that’s still the case.