Every so often every Skeleton Graphic in my scene will lose the startingAnimation I set them to. It's an easy enough problem to solve for runtime, by simply setting an animation to play on awake instead and just ignoring the startingAnimation drop down entirely. Still, I figured this was consistent enough of an issue that I've been running into that I'd bring it to your attention in case there is actually a problem that is capable of being solved.
I'll also update if i can ever figure out a consistent way to reproduce this issue, but as of right now it seems fairly random when it will decide to pop up.