Here it is.
I'm not sure how it happened but somehow a 158mb large decal mesh was generated 🥴
(how it not just crashed is anyones guess)
it's rather strange - there is a hard limit how many triangles a decal can make
and all mem seems to be initialised properly.. so I have no idea of the cause
anyway I better put in some safeguards/sanity checks just in case
for now here is a fixed version of the save:
https://drive.google.com/file/d/1dJHbPpHYxNT81XvVTynfIDeqdV_GoVJV/view