Ragdoll stretches and falls apart?

I found another person asking about the same thing here (But the solution was never found): How to prevent ragdoll parts from stretching apart? - World Creation - Epic Developer Community Forums

That post includes a video of the problem which I brought here:

I’m facing the exact same problem as the video shows, only mine is with the default third person character.

Hmm… That’s odd. My character mesh had a scale applied, (to make him shorter and fatter,) but after removing this scale, the ragdoll looks a little better. Although, not completely better, the overall problem is still present.

I’m playing around with the PhAT for the default third person character. The mesh is always stretching and the joints quickly and rapidly snap out of place and back in, even from slow movements. And the angular limits don’t seem to work. If I shake the mesh violently, it turns into a tornado of individual body parts.

I had watched the official tutorial videos on PhAT, but didn’t see anything like this. What’s going on?

Again, this is just the default third person ragdoll I’m playing with.

No matter what settings I change, I can’t seem to fix these problems, nor can I find any info on them. Please help? :3