I just loaded it back up to check it out and I couldn't get it to show any errors or act in any unusual way - I'm guessing it was some issue with the two different animation libraries and their pin flags overlapping, but whatever it was doesn't seem to be an issue now.

I also re-animated this slightly to achieve the effect you were looking for a bit better.

Out of curiosity did you ever figure this issue out?

Love that you made this version thank you sir, hopefully though maybe you can just tweak it a bit and change the pin so that it's the Back Hook- Leg Pinfall as that pinfall is much more Bossman like.