Been printing fine for several hours with my bigbox pro. But today when I started a print I noticed nozzle was way to high. So I adjusted Z-offset as normal. But nothing happens, it doesn't do anything anymore. I can see it runs its 4 corner probing, and then prints. But it's still in the same height. Anyone got some ideas what to check? The sensor looks to be working, cause it does stop before hitting bed when doing it's autolevel procedure.