Just kill and ress her and she will reset.
That only works if she is in your party otherwise you can't rez her.
Well, I kicked back with a beer and a podcast and played around with this glitch for about an hour before I finally hit on a combination that worked for me. For reference, purposes, I'm a good portion of the way through Act II, and Lae'zel was not in my party when I did this:
I went into camp for a long rest, but didn't rest yet. I downed Lae'zel, did a "shove" action to move her into another spot, finished her off, and then was able to successfully rez her with a revivify scroll. (If I try to do this without the "shove" action, it says she's blocked and won't let me revive her.) I have no idea how or why it works, but I've successfully done this twice. I should also note that whatever initially caused the glitch must still be in effect, because if I swap her in and out of my party again she goes right back to being glitched.
I hope this helps someone!
