Sometimes when I’m animating, Auto-IK seems to randomly become completely disabled.
For example, I’ll maybe leave Auto-IK on while doing some frames of an arm directly in FK or something, and then hit ‘G’ to grab the hand and it just rotates as if Auto-IK was disabled, even though the Auto-IK button is depressed.
Toggling the button doesn’t fix it, and it carries over if I save, close, and reopen the file. Eventually it will reset and Auto-IK will become available again, not that I know how or why. I’ve actually lost some animation a few times by having to revert to an earlier saved file due to this happening.
Has this happened to anyone else? I’ve been experimenting with things like constraints, stretchy bones and bezier bones; I’m curious as to whether it’s something I’m causing with these experiments (no cycles or anything in the console window, though), or if it’s an outright bug.