hi alogeno! Glad you are having fun.
Firmware 2.3 freaks me out.
There is no way to reset floor, and the system just gets crazy confused if you try and re-center with the oculus button. Unfortunately, resetting the app is only fix right now.
I had a "floor fix" that I wrote, but it caused other problems, so didn't make it into release. I'll spend time today trying to rework it. Cross our fingers that this firmware gets patched.