I use the Lightning Digital AV Adapter with my iPad and have had 3 crashes now whilst in every race I have done since the latest update. See my link to post below earlier today.
After seeing your post it makes me wonder if this is related to the Apple Lighting AV Adapter and the Zwift update?
I have factory reset my iPad and still the same problem. Now I’m going to try a race without using the Apple Lighting AV Adapter and see if it still crashes