I had the same issue. I tried everything people suggested in the other thread. Clear the event, hug whatever, run towards whatever, reenter the dungeon until you don’t see the wall attackable, etc.
What finally worked, and I can’t guarantee it’s a fix, or I just hit my 0.01% lucky dungeon enter.
I grouped with another player. Cleared the event first, and I entered, while they stated outside. And then I just talked to the person, and that worked the very first time.
But like I said, I’m not sure this is a fix, or I just got lucky on that one enter. I was just figuring that with 2 players, I could guarantee the outside zone would be event free.