I haven't noticed if my axies keep any feet lifted up, I will try and watch for it and let you know. Downside, they're probably going to assume that I'm there to feed them even I'm not, so they will be excited for nothing, I hope you're happy.
In all seriousness, it would be helpful to be able to see her body language while she's doing it...are her gills curled forward, is her tail curling, that sort of thing. I find personally, and I can really only speak in reference to the three axolotls that are in the room with me now, that body language can help to spot the difference between an axolotl that there is something wrong with and an axolotl that is being weird for no particular reason.