Triggers not working on spawned units

[TEL79]

I tried to search the forums but found no light in how to make the triggers work on spawned units. I am trying to create a scoring system for air and ground kills, but it seems that all the vehicles and aircrafts that get script spawned, do not trigger neither passthrough nor destroyed type triggers. They are like "ghosts" in this sense. Another aprroach I tried was to override the OnActorDead method with scoring, but that resulted in funny things like planes freezing mid-air once the pilot was shot dead. Even the fuel leaked downwards on the planes like they were on the ground in this state.

Is there any way to make the triggers react to spawned units or what is the original OnActorDead function doing, which makes the planes behave like they should (fall down) once their pilot is dead.

I'm trying to recreate Operation Jubilee (Dieppe Landing) scene with LCAs spawning tanks and vehicles on the beach, but it would be nice to count the ground kills of these spawned units storming the beach.