I have this problem but now find that restarting the sim doesn’t even help and the fps counter loads with the sim whether I had closed it in dev mode or not. As it can only be turned off in dev mode but always returns when I turn dev mode off (by either method) I’m stuck with always having to play in dev mode.
Surely there must be a fix or a hotkey for this? I don’t want to download MSFS yet again.
Edit: Dev mode off and then restarting my whole PC fixed it … but all the same I think it needs looking at and it could also be smaller etc.