Only seems to happen in the formicarium, but when I go to delete an egg tile (doesn't matter what kind of ant it is, they all have the same issue), the tile won't be deleted, but I will still get food as if it had. Sometimes I need to click a tile 2-4 times before it actually disappears, but I always get food each time I make an attempt. Speed tiles don't have this effect, they go away immediately, and so I assume the same will happen with food tiles since they aren't eggs.
This does not happen in the missions outside the formicarium.
This does not happen in the missions outside the formicarium.