My camera boundaries are invisible in viewport, I can't move it with tools (I can move it only using CTRL + ALT + 0). I can't zoom in, rotate or anything. I don't think it has anything to do with collections. I'm using blender 2.81. As you can see, light is 100% visible with no such problems. I launched older version of the project, and I can move the camera normally. I think I might accidentaly changed some settings.