Bug Calgara (Neverwinter Nights 2)

So I decided to try yourself in Neverwinter, because I love RPGs, and Neverwinter missed for some reason. Really liked the game, really. Of all the companions I liked Khelgar, a dwarf who dreams of becoming a monk. I wanted to fulfill his dream, so did the test as soon as the opportunity arose. But that's not it.
I was almost at the beginning of the second Chapter, as I recall. When the main character and the squad took Sandri Drowned in the Flask, so that it was safe, but after the attack - gitiyanki stole it. When I had to move I noticed that Celgar was not in the selection list partner. After a couple minutes of searching in the Internet I found that it should be tipo Kelgar not provided for this portion of the game, but then it will be opened, though it is not logical. And now, I have already passed judgment, trial by combat, run to the tavern to see if Celgar available. No, he did not. I went to the temple of tyre, where Celgar was to become a monk to talk to the local priest. I told him that Celgar already passed all the tests, and the priest said Kelgar can start training. After several answers like Well, I agree, Kelgar?, as if he was standing next to me, but no, he was standing in the tavern. When choosing one of the answers, the dialogue just stops like it was not. The fact that he has ceased to be available in a choice - this is certainly a bug, but I the slightest have no idea how to fix it. The Internet tells me ABSOLUTELY NOTHING, after an hour of searching. And all the other partners, including the Bishop (who joined after the attack on the Flask(and which in localization called the Bishop geniuses hell)) - was still available, and the unit was as usual - three. Save BEFORE the attack I don't have as much desire to pass the game with a partner, which I'm not too fond of. I write this purely out of desperation, so have no idea what to do. Please help.

UPD: I've already been for another character, and this bug did not happen. So the question is now invalid.

Spoiler