Forerunner 945. I sync daily and have automatic software updates GPS is not connecting and not working correctly.
Have you checked to see if you have a current CPE?
Put the watch outside with a GPS activity selected for at least 15 minutes and see if that makes a difference.
Pretty convinced an expired CPE doesn't [always] update with Garmin app sync - but plug it into Garmin Express and it updates straight away. The FR45 I played with last week did behave like this.
Did you fix this?