Bug with Leldon (Neverwinter Nights 2)

Hello everyone, I encountered a strange bug while completing the quest "Neverwinter's Greatest Thief".
Already at the final stage, when I was standing at the already open door with treasures, Leldon approached from behind. As a rule, he should talk to Nishka and the battle should begin. However, in my case, he just stands there like a neutral NPC.
And I tried to attack him with various spells (of course, to no avail). And adding to the party through the console, then deleting it, also did not bear fruit. I tried to save to a separate slot and reboot through it, it did not help either.
Maybe someone faced such a bug? I shoveled through a bunch of forums in different languages ​​​​and all without results.
Maybe you can somehow force him to enter the Dialog through the console? can kill him to get the quest off the ground.
Do not pass by, help with any advice.
And this is actually the screen of Peaceful Leldon.