[BUG?] Hiravias is etremely slow

[szaromir]

I was progressing through the Endless Path of Od Nua last night and at one point I noticed that Hiravias is extremely sloooow and doesn't move at all in stealth mode. Browsing through his abilities I found this:

http://cloud-4.steamusercontent.com/ugc/718663991326846341/9788CC3A4AE05B2D5B1FED9A873B9485F57E0674/

Basically looking at the unfinished description it seems like  a permanent curse in Baldur's Gate games, but the devs decided not to go through with it and it only got unlocked  in my game by accident. I only found this report about a similar issue here, but that's not exactly helpful:

https://forums.obsidian.net/topic/69896-392-it-will-take-a-billion-years-to-complete-your-journey-from-north-bay-wilderness-chanter-loop/

 

Here's the save file:

https://drive.google.com/file/d/0B0YMThdt-FHBLVI5NlN0RUQwSzQ/view?usp=sharing

 

Sadly I tend to ovewrite save files and don't have a recent one I could go back that isn't affected. I guess I could just drop Hiravias here and now, but I really like him in combat and would like to complete his quest as well. Help, please?