Found a strange crash

[Aynekko]

Engine build: 3654

• start the engine with any valid background map
• loaded a save game, but the save itself was made on much different version of the map, which doesn't have some objects anymore (mod in progress). So, naturally, the map doesn't load and I'm seeing this in the console

23842 0060 svc_bspdecal
BAD: 23842 0074 svc_bspdecal
Wrote erroneous message to buffer.dat
Host_Error: assert failed at D:\a\xash3d-fwgs\xash3d-fwgs\ref\gl\gl_decals.c:704
Server was killed due to an error

Everything is fine here. I loaded this save by accident.
But then I try to load a valid map and the engine crashes:

Sometimes it's this in the engine.log:

_Mem_Check: trashed header sentinel 1 (alloc at :0, check at D:\a\xash3d-fwgs\xash3d-fwgs\engine\common\zone.c:459)

I tried to reproduce it with other maps but couldn't.
Debugging my mod still shows me this: