MeltedHugo

How to reproduce: In the VAB, attach something like a tank (or any other part) to the back of an engine and disable the engine's fairing. Result: The engine fires and produces thrust. Expected behavior: The engine should either refuse to ignite if something is directly occluding the nozzle (KSP1 behavior iirc) or explode. Example video footage (not by me): https://youtube.com/clip/UgkxozY_PVoDdWC8I5qRzR9DXdmMhBS8l3rw