Maya animation loop glitch unless compression set to optimal

Animation
1

I’m importing Maya-authored models which contain all animations, using the generic rig, then defining each animation by start and end frame. For looped animations I see a single frame glitch/twitch when the animation loops if I import with compression set to “off” or “keyframe reduction”. The only setting that leads to the animations working correctly is “optimal”.

Is this a bug or am I missing something?

The behaviour is the same in 5.1.3f1, the current 5.2 stable release, and in patch 5.2.1p3

Thanks in advance for any help. Please let me know if you required more info.

2

I’m having the same issue, but not even “Optimal” fixes it. There’s just a weird glitch happening. Please let me know of you happened to solve it.