I had a similar situation with a tank full of wheels. They all fell into the ground upon spawn. Then I updated the joint axis to all have their X axis point forward and their Z axis to point up. That seems to have solved the issue for me, but I will admit I could have solved it unawares some other way, it’s just that the axis orientation was the only thing I changed AFAIK.
It took me all afternoon to learn about joint orientation and bones in blender and how to get them to transfer to UE (or Unity for that matter), and at the end I had to export from blender into UE5 using GLB rather than FBX to get the joint orientation to transfer over correctly. (Now I use GLB for all Blender exports.)
There was a video on using Chaos Vehicles for UE5 that I got this idea of orientating the axis from. In other videos of Chaos Vehicles, I noticed they were setup this way and the narrator didn’t mention this as an issue to look out for.
He discusses the axis orientation at around 2:30 in the video.
Had the same problem with the wheels i set the sweep shape to spherecast and then it caused this issue switched back to raycast and does not happen anymore
