I'm going through the same thing. Today was the worst. My watch didn't connect for the entire 60min run.
Ive done the hard reset, deleted all memory, and have an up to date software.
So frustrating.
It happened the same thing to my watch. Luckily it was still on warranty so I sent it to garmin and they send me a new one.
I've just started having the same issue as well. Tried everything recommended. Did either of you glemo 7 Chrism1999 get any improvement