Breaking lords out of prison

So i encountered this bug in WFAS too, in essence, unlike in original warband some dungeons have bars that make it impossible to speak to prisoner, i have yet to find a way to open those and they make rescue missions virtually impossible.

Not impossible, just very difficult.  Keep moving around and looking up/down/etc...All of the lords that are stuck behind bars have a small 'hitbox' where you can chat with them, and that location can be difficult to find.