I’m adding to the stack of “crash on save” posts in the archive.
Today I rode my first metric century on zwift. It was great. I unlocked two new kinds of kit, and got a badge. Then when I hit “save”, the program hung for a while, before exiting with no save.
My ride didn’t appear on strava. My zwift profile has a “partial ride” saved, which is merely 95km 
I’m guessing the missing data is just gone (perhaps lost to a netsplit when I tried to save?) so presumably there’s nothing anyone can do to get my precious achievements back.
Does anyone have any hints for reducing the probability of a crash like that in future?
I’m running zwift on windows 10.