I did a save game so I could reference this if asked.
Area is FW5404, x-457, y=2012. They're in the area prior to encountering Mulhaney and Xan.
Running Tutu4, FixPack15, Latest Finch, Siren's Call, G3TutuTweaks, BWL's Tutu Mod - Candlelight?, TutuGUI, Tutu Casting Sounds. Have yet to add the Map Notes mod.
May not be his scripts or dialog doing this.
Because I have some knowledge of coding and Dorothea's new fix for sending NPCs elsewhere upon kickout is not yet officially available I've been doing a few dialog changes of my own to _Imoenp.dlg, _Xan.dlg and _Xanp.dlg to send them to the Friendly Arms Inn with the appropriate EscapeArea code so I could keep Mur'Neth. When I recompiled those .d files with Weidu it didn't seem to create a new Dialog.tlk so I just moved those files to Override as I didn't change any text strings. I wonder if this screwed up Mur'Neth.
BTW - read who voiced him, big surprise. Thought it was you speaking through a straw in a water bottle or any other beverage.
Edited to add: Running under Windows 98SE.