Hey,
We can not figure out what's causing it but every time Fighters start or land (spawning and despawning) the Game lags severely we checkt all server stats no lag of performance there, and on the client side as well no spike in cpu, gpu, ram or networkactivity to explain the Lag.
Used custom Fighter design https://steamcommunity.com/sharedfiles/filedetails/?id=2060947160
Tested by launching and landing 4 full Squads R-Miner from 4 Bays
Thanks a lot i hope it helps
Best Regards