This is a game breaking bug making it impossible to be played.
For me it happens while crossing the red river (connected to a certain companion quest). After doing the quest the following effects started happening: the followers run in one place for ages, when in combat I get massive delays on the things I'm doing - for example on simple melee attack the effect on the attacked takes 3-4 s to actually take effect. The game simply becomes unresponsive - browsing inventory, saving, etc nothing works normally. Hope that fix is coming asap ...
p.s. Had over 100h till that moment, the game was running normally.
Last edited by white; 22/12/15 09:10 PM.