Retrieving a lost workout in Zwift
If your Zwifting is interrupted by a power outage, computer reboot, or Internet problem, you may "lose" your current ride without being able to save it properly. Or sometimes everything may seem to be working fine, but after your session, the saved ride never shows up on Strava and signing into Zwift shows your ride as a "partial" ride. This indicates Internet connection issues at some point in your ride, which prevented your device from sending data to Zwift's servers.
Take heart; all is not lost! Zwift saves your activities on your device as well as sending the data to Zwift.com. No matter what happens with that Zwift.com connection, you can always retrieve your local file and upload it to Strava or any other service.
Click here for Zwift's instructions on saving a "lost" workout.