My watch just today started an endless reboot cycle for no reason.
I noticed that the Watch was not notifying me of any texts today and it seemed really slow and weird yesterday.
It will not allow me to access anything on the watch the reboot time is so fast. I removed it from the iPhone and rebooted the iPhone and nope - no way - nothin'. The reboot of the Watch takes a LONG time (but that is normal I think) and the watch is actually warm, which it never is - and once it comes on - you cannot even navigate to the settings to reset it - it's rebooting again.
I have filled out a warranty request, (still under the year) but I will say this.
It SEEMS that all was fine until I loaded the most recent version Watch OS two nights ago.
And... it was not very long ago that Apple put out an update for the iPhone because my iPhone ( and more) was doing the exact same thing!
iPhone and Watch both running fastest builds as of this post. I believe this is buggy software or some combination of my iPhone 7 128GB (also still under warranty) and this Watch V2 and software.
Not happy....