HAHAH I walked away from this game for a few months and when I came back, I had totally forgotten about which headstone warped to where.
HOWEVER
I did encounter a legit lantern bug this weekend where I
had summoned the cathedral ward NPC that helps you with
and I went down to some fog gate past some NPC enemies that I couldn't enter (no on screen prompt to walk through it) so I ran back to the main catherdal lamp to warp back to hunters dream to cash in my souls and I again found no activation prompt on screen to use the lantern.
Interestingly enough, there was also a fog gate blocking the route back to Gascoigne's area as well so it seems like the game sort of glitched up in a way that it was thinking the whole cathedral ward was a boss fight arena or something.
I exited out of the game and opened it back up and it was back to normal.