Map stuck loading only after being saved

Hi, I have a problem with a few mod maps, when I spawn extra vehicles and save the changes in the world editor after i close beamng the map won't load anymore, but if I delete the saved map folder in C:\Users\USER\AppData\Local\BeamNG.drive\0.32\levels
then the map will load again. It only happens with some mod maps not everyone.
Does anyone know how to fix this and make the map able to being saved with extra cars and meshes without being stuck the next time I try to load it up?
thank you!

 

Maybe some old maps don't support the new world editor. Also don't even think about saving vehicles in the maps, it's impossible.

 

I wonder if there is a way to fix this type of issue with some simple code