So I had a second car I left in my base in a farm near riverside, and I left using my main car to loot far from my base (went kinda south). I didn't enter the second car or interact with it for a while.
I spent two nights in the new location where I looted. After I got back to my base, my second car despawned. I did not restart the game, it was in a single play session.
I am playing in builder mode in 41.20.
I checked my save folder and there's a backup save where the car is still there if needed. I have attached the log files from today.
I don't know if I can give more information to the devs to fix this issue, let me know
25-11-19_22-12-55_ZombieSpawn.txt 25-11-19_22-10-30_DebugLog.txt