1.7 Bug or is it unity?

so I went back and remade and added some new bones to a character rig, tested it out it works fine with animation and everything. I got into my UFE project and the character animates fine in my character select screen but once the game thats it freezes the game kinda. The character I select just freezes while the cpu just stand there in place. so im confused wiith wtf just happened.

I have gone back and tested out the old rig for that character and it works just fine with the standard animations for ufe/unity.

has anyone else encountered this problem?