Warden's Right Arm and Head instantly resets its animation timeline when digging.

How the problem starts is when the warden is when it fully digs underground, 2 bones (Right Arm and Head) instantly stop the animation. This is similar to bug report MCPE-154544 with emerging, this one is happening with digging. 

Cause? : it could be that in the animation file, the last frames of right_arm and head are smooth and not linear for their position and rotation. setting that to linear should fix that bug. (take a look at the attachment's selected frames)