Caught some nasty bug - every time I reload game all my characters get positive energy famage. Around 60 damage per person. Thats REALLY annoying, since in Motb sleeping is not that easy. Does anyone met this bug before? Is there a way to fix it?

Do you use Kaedrin's PrC pack by any chance ?

It's not a bug, it's an intended feature of Kaedrin's pack. Don't ask me why. You can disable it in Kaedrin's option 2DA.