The admins are blatantly censoring the drawing, putting checkerboard or whiteout circles and squares over that part. We need all hands on deck to overwhelm the admins!
If you spend time watching /r/place you see that pictures mostly form in a natural, progressive way. This is the only place you see hundreds of pixels being changed uniformly all at once. Even bots would be making more gradual changes than this. It’s clearly someone who has a brush tool for censoring.