Trucks parked on the second Chiapas map are permanently deleted after every restart — reproducible, not a cloud issue

I have a persistent problem since the new map with SnowRunner (1700+ hours) and I've already ruled out the usual suspects.

Setup: PC, Steam, local save only. Steam Cloud disabled (because I ran out of Steam Cloud Memory of 100 MB no idea why, I only have 5 small mods). PROS disabled and PROS cache token deleted. Verified integrity of game files via Steam - passed, no issues found.

Steps to reproduce:

1. Park one of my own trucks on the second map of the Chiapas region.
2. Travel to the first map and enter the garage there.
3. Select "Return to Main Menu".
4. Select "Exit Game".
5. Restart SnowRunner and load the same save.

Result: The truck left on the second map is completely gone. It doesn't appear on the map, in the vehicle list, in the garage, or in global storage. It's removed from my inventory entirely and I have to buy it again.

What is not affected:

• Trucks left on the first map are all still there.
• Task/mission progress made on the second map is preserved.

So the save is clearly being written - it's specifically the vehicle data for the second map that gets dropped.

The bug is fully consistent and reproduces every single time I try it.

Has anyone seen this, and is there a known workaround? Is it region-specific to Chiapas, or does it happen with other multi-map regions too?