Every time I complete and save a workout on the Android app I find that the name of the workout has been changed to a generic description like " Moderate Mixed Breakaway Specialist Ride" when looking at it in the table or on Strava.
I’m using the latest version available on Google Play (last updated 7 Jan 2020)
I select a workout, start it and do it until it reaches its end and the timer runs out. I finish cycling. Hitting the back button appears to me to be the only way to bring up the Save dialog box. I select save.