Khatoblepas

I've been helping a friend play a modded version of Baldur's Gate recently, and we've come across something really weird in our version.

The most worrying thing is that whenever an enemy casts Web or Entangle, the computer slows to a crawl and the spell effects refuse to end, even after days of waiting and resting, and moving to an inn aggros all NPCs there - somehow having Web's effect persist on us is a hostile action. We can use Ctrl-R to remove the web effect from the party, but the computer slowdown persists on the maps where it was originally cast. Rings of Free Action and similar don't seem to protect against this version of Web either! This renders maps like the Spider Forest completely unplayable, due to the spiders love of casting Web. The Spider Forest map is now a vast wasteland of lag, even when there is no Web effect currently on screen! Is there some way to dummy out Web's spell effect or something so that we don't have to suffer slowdown and map ruination every time we encounter a spider?

The second thing is a minor annoyance, but there are enemies that look like werewolves called Orc A that are immune to normal weapons and have potions of vocalize that show up occasionally. They only give 5XP, and are a bit irritating, but are otherwise harmless. Is it possible to get rid of these?

Is it a particular mod that is installed, or a bad interplay between them?

Thank you in advance, I hope I posted this in the right place. I hope we won't have to redo our game over, too.

(Whoops, it seems I got logged out with that last post, sorry The Guest at the bottom is me!)