It appears that on Debian the standard apt install of libbullet-dev (version identifier 3.24+dfsg-2.1build1 amd64) produces unstable results in some cases. I know that Issue 896 has already been opened and closed regarding something similar to this. Sample in 18_Vehicle.py tire is wobbly when accelerating and turning · Issue #896 · panda3d/panda3d · GitHub
However, when building Panda3D from source, I’m not sure how to fix this. Looking at panda3d-thirdparty, I see that there is a small patch file (bullet-btvector3-shuffle.patch). Is this part of the solution to “fixing” the standard bullet build? I’ve played around with building this way, but haven’t figured anything out yet. Thanks in advance.