Kerbal Space Program

When some thrusters from the previous stage were still burning, and subsequently crashed into terrain or were otherwise destroyed,
there will stay an empty place in the staging display where they were.
This becomes quite annoying when you launch large ships and you have a dozen or so of small solid engines that push the spent parts off the next stage because the remaining empty places take up all space and you can't see any other stages.

Steps to reproduce:
Build a ship that has three stages. 2. one small solid booster. 1 decoupler and a several of those small solid engines 0. a parachute (See SShot1)

Launch the ship, after the solid booster runs out of fuel, decouple, deploy parachutes immediately and wait until the booster crashes to the ground.
The still running small thrusters are still displayed in stage 1, though they are on the part that got separated (See SShot2)
and when they are destroyed they leave an empty place behind. (See SShot3)