Comment by josephcsible

tl;dr of the explanation: the Skimmer vehicle is missing a wheel scale definition, so its wheel scale gets read from uninitialized memory. On previous versions of Windows, this happened to be the wheel scale of the previously-loaded vehicle, so things happened to work fine. Starting on Windows 11 24H2, LeaveCriticalSection (which gets called between loading vehicles) uses more stack space than before, so it now overwrites that memory with a gigantic value, resulting in the Skimmer spawning so high up that it may as well not exist at all.