When this project is first loaded, a click on the full-screen costume runs the "when Sprite8 clicked" script (as you can tell because the musical note plays) but the costume does not clear from the "hide" command. I believe the sprite is hidden, though, because subsequent clicks on it do not result in the note being played. Clicking on the green flag causes the project to behave as expected - a click on the sprite results in a hidden sprite and the costume disappears. It appears that the mouse click is necessary for the bug to appear - simply having the sprite hide after a few seconds seems to work fine. It seems to matter which costume is used. The bug will show up for any of the full-screen costumes (1,2,3) but does not show up with the smaller costum (4) Moving the sprite from center by even a single pixel will casue the bug to not show up. Maybe if any of the stage is showing around the sprite, the bug goes away? That would explain why the smaller costume does not show the behavior.
