OK, I think I found the cause to some degree. Seems it is related to fpsVR running in background. Don't know if fpsVR changed something internally with coordinates but when I close it then alignment works. Last fpsVR update was April 6th so could correlate. I can also get around it when letting fpsVR running and do "Reset seat position" in SteamVR. Both should fix coordinates reported. This is totally strange since visually ones sees no difference.
