Animations that used to work are now messed up

I have noticed that a lot of animations that were working fine in Unity 5 about 6 months ago, are now not correct in the latest Unity. I have quite a few animations like this, since they have gone bad the character leans forward 45 degrees and one of their arms stick out twisted behind their back.

The animation that I just noticed this on was working fine (comes from the republic assets on the store - StandingIdleLooking) and is set up with rig-> humanoid. What could cause an animation that was perfect to suddenly be like this ? I have noticed a number of my mixamo fuse and poser animations also do this now too.

 

Try reimporting the avatar those animations are using.

 

thanks man, good idea, will try it!!!

 

Deleted library folder and reimported, they work now!.. Thanks dude.

 

reimporting the model is working thanks.

jeff animator at https://videoatclick.com