When I dragged sprites from my own project into the backpack, it causes the sprites in the original project to “disappear”. Clicking the Show block does not cause it to reappear. When I click on the sprite's thumbnail to see where it went, the blue outline block says it is not on the stage area, but instead in the area where the backpack is. Though a copy of the sprite should be in the backpack, the sprite from the project should obviously still be on the stage and not in the backpack area. This only happens when I am the owner of the project that I drag sprites from.