Rigged hand glitch - Help


I have an issue with a rigged hand, where the index finger pops at between frames 140-160 (in 3 seperate animations)
There’s no wonky keyframes, no issues that I can notice in the rig. Just a weird pop with no identifiable cause.

Wondering if anybody with rigging experience could shed some light on what’s going wrong?


If you’re able to help, here’s the download: Link



The problem disappears when disabling the Xpresso on the controller. A further look shows that you have keyframes on the range mapper node for p-rotation that changes the mapping range. The key sits on frame 152. That causes the glitch. An accidental keyframe?



Ah, Ceen beat me to it!


You guys are awesome. Thank you!