Hello, 

I hope I am doing something wrong. 

In the following video, I try to create a custom actor group, using just Kevin as the actor, and a custom motion I downloaded from Mixamo (which is not an iMD). 

When I use the custom actor group and press play, the animation starts normally, but it progressively jitters increasingly and it reaches a point where it's unusable. 
Please watch the following video and focus on the legs of the actor. 



This happens for no apparent reason.
Interestingly, this doesn't happen if the motion is an iMD file, it only happens when I use RL motions in the custom actor group. 
Also, that mixamo animation doesn't jitter when looped manually, outside of actor group mode. 

Is anyone able to re-create this? 
Thanks