I'd guess until at least #779, as that is what the first trade for this run is listed as having on Amazon (770-779).
As far as depowering goes, this actually has a good explanation for it at least. I'd much rather this than her just being portrayed as weaker in regular continuity with no comments being made on it. I'll take Ratatosk telling her she can fly if she remembers how over her just inexplicably not being able to/forgetting to in a normal run.