Rig is getting broken after setting few keys on control curve

[vladlenafanasjev]

Hi. 
I have got a problem when I set a few keys on the control curve of my rig it gets broken if I do Cntrl Z or set control curve values to 0(initial position), it's like some constraints are not being calculated. The funny thing is if I move even a little bit controller or switch the visibility of anything in a scene on and off, the problem is being fixed until the next time rig gets broken. I use Maya 2020, and I haven't tested it in other versions of Maya, also I noticed it's happening in Parallel evaluation mode, but once you get the problem it doesn't matter if you switch to Serial or DG, only restart Maya helps. Sorry, I can't provide any screenshots or scene files, but if anybody encountered the same problem please let me know how you fixed it and why it's happening. The rig works perfectly without animation keys on it.

Update: I noticed one more thing it only breaks when you turn on Cached Playback toggle. It doesn't matter if you turn it off later, once you turn it on rig will always keep breaking

[vladlenafanasjev · Accepted solution]

Solution: Some driven keys for some reason were making constraints break in Parallel evaluation mode, once a few driven keys were removed problem is gone. (Driven keys which caused the rig to break were in totally unrelated places to the rig, so if you encountered the same issue, you might need to look everywhere for it, not only where it breaks.)