The issue seems to be that the rig has too small of legs. After jumping, occasionally the rig will clip its front legs into the Baseplate, and begin sliding around at superspeed.
Honestly I extended the legs a little further than I had before and it fixed the issue. I do wish I could use the regular leg height for this rig though.
This is still an issue, if the Player happens to fall from a higher height, they are more than likely going to clip halfway into the floor and gliding around on the ground.
Anyone have any idea if some sort of script could handle this?