I’m using blender for modeling but I don’t know where to look for bone scale, as instead of being scaled, the position of the endpoints are changed.
If you remove the physics bodies on the thighs, then it will be the calf bone that ‘teleports’ to the pelvis, and if you remove the calf physics body, then the foot bone will teleport to the pelvis.
Linear constraints are off.
I have included my model
here.
If you are also using blender, you might find that the bones have weird orientations. This is for compatibility reasons with UE’s animations.
Thanks you!