I have found out that if you use this Addon, and you go in Ragdoll, it will show the ragdoll twice.

Basically what it does is it shows the ragdoll as usual but also ur playermodel standing on top of the Ragdoll. I think this is some sort of a render Issue.

When I deactivate the Addon the Ragdoll is just normal.

You can try to redo it if u have a Third Person View Addon and ULX. Just use the !ragdoll command on ulx while being in 3rd Person view and you can see for yourself.