My GPS was working fine on my Vivoactive 4S yesterday, but after charging and syncing by USB/laptop last evening, it has developed an offset failure. I have had two outdoor activities today, and they are both around 100 meters offset eastwards and slightly north. The shape of the track looks fine, it just doesn't match the map. The watch says CPE info is current. Sounds to me like the CPE information could be wrong.
Example activity:
connect.garmin.com/.../9101333872