I wish i knew what had changed. A restart might fix it, but ive been too busy to do one. I did not do anything. But i had accidentally left my computer on overnight. I restarted it this morning. And that was all i did.
Its because its on an adjusment layer i think. Maybe add it to another layer, or turn off the black and white circle so that its no long an adjustment layer. I think ive had something similar.