The email came this morning, posting since there isn't a link up on the forums yet.
https://www8.garmin.com/support/download_details.jsp?id=11751
Have tried the GPS 2.50 just to have a quick peek if Galileo performance would improve. Well, it's more the opposite, even with up to date EPO file the GPS fix took half a minute or longer, reproducibly. I changed back to 2.30 and the fix again is established within seconds. Seems to require some further finetuning though.
GPS 2.50 is now available through "normal" update channels, it's in my synch queue but I have auto updates turend off. Waiting for more reviews until installing it...
@HUMODDA @WillNorthYork
I reset the watch.
but it doesn't change anything, I still have the problem with the sensor like here
My recommendation to you would be to get in touch with Garmin support and claim a hardware fault. Seriously, your error does not look like a software bug to me, this seems more like a hardware issue. Especially if you tried the secondary master reset. This actually would have reset all the software on your watch to the initial state, and if that does not help, your issue is probably more serious and would require a replacement.