Im not really sure how to describe it properly. But i will try anyways. If vehicle that created projectile (aka shot it) is located beyond vehicle view distance (NetworkDistance param in server setting) players wont be able to see and hear the sound and particle of explosion.
This bug makes artillery unusable.
I tried adding RplComponent to projectile but i dont think it changed anything.
https://youtu.be/2Spfu1_Kdro
^ This video contains 3 PoVs. One From gamemaster and two from players.
As you can see, artillery fires the shell and for Gamemaster everything looks like it should look, loud boom sound and a bright particle. But for a Player standing in the same place as Gamemaster camera there is NO visual effects. Vehicles on impact point just explode without any sign of shell hitting them.