Apparently, vehicle weapons are have same problem
- download & launch repro mission on dedicated server
- left AI-crew tank firing at right tank
- no any particles on firing main caliber, only flash(zasleh) animation (3d model)
- note - look carefully at 30mm gun on top of tank, its gun particles seems work random (every 3rd shot I'd say)
see video https://youtu.be/o-NXBUI7-Xg