Gif of the anomaly: https://gyazo.com/cd36fdcf8a61c39fc8b74e4f0090bbce
I'm 2100 frames of animation into this character and in the middle of working am suddenly unable to keyframe the x-location of my bones. Pressing "i" in the viewport keyframes every other property, but not x-loc. Pressing "i" on x-loc in the transform/bone panels does nothing. In the transform panel of the gif, you can see x-location is not locked, so what gives? If you know anything that could be at fault--any unintended shortcut I could have entered, etc.--that could have caused this, do let me know; I would appreciate it.
There are others I've found who have encountered this issue in prior years, but their threads have gone dead without solution. I am at a loss and can't afford to stall here.
