Simulating Physics in my Physics Asset breaks them both. But separately they work

As you can see in the video below… if I simulate physics on either arm separately it works just fine but when both are simulated they somehow get connected and my right arm moves down to the origin of the bone its on. Not sure why this is happening.

having the same issue 2 years later…
Simulating Physics causes body part to move location : r/unrealengine (