Game crash loading Rhino in flatpak

[rchar01]

Something that always crashes the game while loading a track is
selecting the "Rhino" car. Tracks load nearly completely, but
then the game crashes before the scene gets displayed. All other cars I
tried work normally. And with Rhino all tracks crash.

The game is running in flatpak.
Last message from terminal:

/usr/include/c++/12.1.0/bits/stl_vector.h:1123: std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](size_type) [with _Tp = CARWHEEL; _Alloc = std::allocator<CARWHEEL>; reference = CARWHEEL&; size_type = long unsigned int]: Assertion '__n < this->size()' failed.

[cryham]

Replied on forum

[rchar01]

The contents of the files are the same.
Is there anything else I can check?
How can I further debug this error?

[cryham]

Replied on forum. No need to post here and there, I'm checking both daily.