King of the Mist stronghold, stuck on last phase

The King of the Mist does not enter the arena after the labyrinth. He stays on the balustrades, so my character is stuck in the arena (portal deactivated), so I have to log out.
This has happened to me 2 times in a row, although it worked fine before.

Maybe a clue: I didn't have this problem when I met the stronghold before I had the quest. Then, when I validated the quest before stronghold quest, I didn't receive the stronghold quest, which was automatically completed and I received 4 wildwood points.
Since then, the stronghold has been buggy as described above.

The King seems to be running away from the player.



Bug Report 3 260 026 831

Edit: I encountered him again and the fight went well.