My outdoor ride on Sunday did not sync to Zwift. The sync has been flawless since I set it up when the feature first became available. Never had an issue before.
To try to correct the sync issue, I deleted the activity from Garmin Connect. Then deleted and recreated the Garmin connection in Zwift Companion. I reloaded the ride to Connect from my Garmin Edge 830. It shows up in Zwift Companion now, but it does not show any XP associated with it.