'No chat' bug

[Antiga]

When talking to one of the mining dwarves down in the creiston mines, I repeatedly kept hitting escape right after talking to him, in order to get a roasted rat dialogue. The 'chat' screen is unusually large and shows no text except 'no chat' in a small white font.

It's the first of 2 dwarves on a small path leading to a small room which is guarded(First enemy you meet in creiston mines if heading right for Baron Ahey's fortress).

I had already used this method on the other dwarves.. Worst thing of this all is that it freezes my game up. I cannot exit the dialogue, nor go in menu or anything.

Edit: I had already defeated Ahey a long time ago, so the dwarves would sometime say different things about the baron as well, in addition to their standard texts.