Current: In BG2: Before completing Jan's quest, Jan may stuck in "thank you for everything! Jaella is well." Purpose is Lissa, which disappear like second after you enter room, so she can't say her lines.
Hasted character can of course, force her to speak before disappearing, so you can at least take Jan back to party. (There is
(Tested with tweak & fix packs.)
Expected: Game don't lost character during quest.
Comment: It took me ten days, to complete that quest. Maybe disappearing is part of time failing.