OCULUS Scene follows HMD rotation... Urgent problem...

Hey guys!

I have huge trouble… I’m using Unreal Engine for ArchViz with Oculus… It all always worked pretty good. I’m always using the EgoShooter Template as a start. In my new scene I have a big problem.
Whenever i rotate my head with oculus on, the scene seems to follow and move under my feet slightly… It’s really annoying. Why is that? In all of my other scenes, that doesnt happen.
Sorry for my noob questions and thank you so much!