https://github.com/BuiltBrokenModding/ICBM-Classic/blob/0f207d6b88417f33627d51e023381fb93ab358f2/src/main/java/icbm/classic/content/missile/tracker/MissileTrackerWorld.java#LL221C32-L221C32

Above code is not checking if the world spawned the missile from the simulation system. In the event it returns false we need to retry or at minimal log an error for users.