At the end of that one it seems the reporter declared it to be resolved.
However, I am noticing a recurrence myself, of this bug in particular, as reported by the user Drow Arrow:
Any change to the inventory while shifted causes a green sparkly re-calculation of my stats, and it gives me multiple "You cannot use that item" messages, and then my AC drops by 14+ points. My guess is that this has to do with the way shifted AC is calculated, since it is being buffed on this server to take more from equipment than the base game says it should. When it re-shifts me I think it is giving me the amount of AC I "should" have in the base game, without the benefits granted by Blackstone Keep."Every time I interact with a chest (taking/placing items) or buy from a vendor (can't sell while shifted) it does the usual unshift and shift thing but now it's forgetting my merged gear (which i know because my AC drops from 40 while shifted to 28) so I have to unshift and shift again to fix it."
Since the previous thread indicated a resolution, I wanted to bring this up as a new bug report, as the situation might well have changed since the original thread in 2021. I am not sure how it is intended to be, but it seems to be a bug, so I shall report it as such.
Thank you for your time, have a good day! ^.^