It looks more likely the problem is on your pc. You're literately the first person ever to complain about this.I've played V2.8 now and there seems to be a major problem. When changing the screen (entering or leaving a building and so on) I always have to wait 1-2 minutes (!!!) until I can continue playing. During this time the game window is frozen!
Do you have auto save enabled? If autosave is enabled a save will be created then switching from inside or outside.
Possible there is something inferring when the game tries to write to disk? A virus scanner/firewall or some other piece of software.