Errors during sync

I am not sure if this is a Fenix 5x problem or Garmin Connect but here it is anyhow... This happens to me every time I sync. I get the error and if I tell GC to sync again, it syncs fine. I sync again I get the error again and so on and so on. I called Garmin and they had no idea. The watch is on version 10, GC 6.7.0.0 and I am on a MacBook Air...
I have restarted the watch, I have reset the watch, I have taken it out of GC and added back ok, I don't have another Fenix 5x on my account, I verified this is default activity device. ciq.forums.garmin.com/.../1391818.png ciq.forums.garmin.com/.../1391819.png