I wonder if we wrap them in an anonymous node?
It works if I change flex: 1 to -webkit-flex: 1:
Seems to WFM?
Sigh, I'm an idiot, it might just be that the new z-index stuff doesn't work with iframes for some reason then...I'm pretty sure that's broken. Maybe I screwed up testing that too. :(
I'm going to mark this bug as invalid, but feel free to reopen with a repro.
Created attachment 159205 [details]
Ok, it seems to just be the layering that doesn't work correctly.