I'm pretty sure that fix has nothing to do with the postern door or the new flashing postern house but one can hope they simply didn't phrase it right and that the major flaw they introduced with summerset is finally getting addressed months later.
Even if it was a fix, what else did it break because that's how ZO$ does things
Yep, not fixed yet.
They do however fixed the walls health issue and now (finally) they no longer disappear.
Invisible posters walls still there obviously.