[1.31] Crash on battle load - loading layers

I very frequently get a crash on load on repeated attempts at a challenge. I happened to notice this today, as it might be helpful: it was loading layers for a ship type that I had stripped out from the previous attempt and were no longer present.

Perhaps these crashes are related to loading assets for ships that don’t exist?

My game crashes 90% of the time on the second battle (on load, or 5 seconds in).