LCD image "Change Interval" permanently stops working
I've had this happen in multiple worlds - the image interval function randomly stops working and there's nothing I can do to fix it. Even with all mods removed it just won't come back.
Changing the interval setting makes it change image ONCE. So does cutting and pasting the grid. But it won't start actually working again.
Going back to an earlier Backup save, if you have happen to one from before the bug appeared, will get around it (until you encounter it again). But if you don't have a clean backup it will simply never work in that world ever again.