Rocket puppies have an issue with their projectile attack that makes them disappear from time to time. This issue occurs in levels where there are holes over which the missiles can travel. When the missiles fly over holes they drop down very far, to the point where you cannot see them anymore. Once the missile reaches the edge of the hole to land that is walkable it then appears again because it hovers above the land.
This issue occurs because the rocket hovers some height above the land but the hole in the level does not hold the same level as walkable land. So when the missile goes over the hole in the level it then hovers above the bottom floor but is still lower than walkable land. It makes it very difficult to avoid missiles since the missiles appear to become invisible for a time.
Please fix this bug so that the holes in the level have the same base height as the walkable land surrounding it so that the missiles will not "disappear," as this makes tier 3 runs even more difficult when rocket puppies are present.
I've had the same troubles. It's even more annoying when the follow you across the map while still invisible. Also, they seem to have the ability to jump over switch activated doors.
Fixing this would be great.