I have the last one.2.0.1 (with the expansion pack)
Well, i'm afraid i can't help you much as i don't have the game yet although I'm informed of the many bugs that exist as l took some time to read about them in the official forum.
If i were you, i would do a fresh install of the game and see if this fixes the problem. If you go that route, make sure you don't forget to keep your savegames before uninstalling!
Maybe you should ask your question in the official support forum? https://forums.obsidian.net/forum/104-pillars-of-eternity-technical-support-spoiler-warning
I made a fresh intall of the game. Kana is still standing there.
I was thinking in using some save editor or something like that to get him back.
What do you think about that?