I'm not sure if this counts as a bug or not, but I'll record it here in case it helps anyone out. Also, this is referring to the last version of Julan, 2.03 or something, not the 3.0 beta.
There's a point in the game where Julan asks for a drink in the tavern; I think you actually have to get him drunk to learn about Shani. I was using Julan in conjunction with the "On the Move" portable Ashlander Tent house mod, and rather than resting at the inn I got Julan drunk in, I just left, adventurered, figured out he was drunk, and then tried a slew of everything and anything to get him to stop being drunk, from resting in the house to passing time outdoors to trying to advance his quest.
In the end, I just reloaded the save where he was initially drunk, rested in the inn, and he sobered up on his own.
So basically, when Julan gets drunk, don't leave the inn until you get him sobered up again, otherwise, you might spend a very long time being frustrated with a very drunk Julan like I did. Although it's a good way to go through all of his very thoroughly scripted drunk reactions and voice acting though.