Summary
Whats happening with this window lighting up when you turn the camera?
Lumen scene looks fine, seems like parts of your scene are changing as you move the camera though which could be causing this.
Edit: Actually think I am wrong, this just looks like a viewport artifact from using spiral blur with against the scene texture in your glass material…
Really not sure what the issue could be. I would try disabling your post process volume and seeing if it improves, at least that will narrow it down to post process settings or not.
Also you didn’t change any of the cvars of the editor did you?