Hello antonpiatek!
Welcome to the forums! We apologize for the inconvenience with your game. We have written a bug to have our team look into your issue. If I may ask, could you please explain the exact steps we can take to reproduce this bug? As of right now we have not been able to. Also, are you using any mods or console commands for your game?
What you can try to do now is to verify your game cache in steam and see if this resolves your issue. In your steam library, right click Pillars of Eternity>Properties>Local Files>Verify Integrity of Game Cache.
We appreciate your patronage and hope to be able to address your issue as quickly as possible.