Launcher version: 1.5.144637
Game version: 1.82.144647
Branch: main
This issue happened twice while playing two different MP-Missions, one simple zeus mission and one mission with many scripts and AI involved. After playing for 2-3 hours, performance goes from ~50 fps to 7 fps (changing the visibility settings doesn't make any difference). Deleting all objects on the map with zeus, disconnecting from the server or restarting the mission on the server also changes nothing. Even the main menu is laggy and uses 6 GB of RAM, CPU and GPU workloads stay the same as always, so the actual hardware should have no problem handling this. The server workloads are also pretty stable as usual.
After restarting the game, everything was okay and back to normal.
This issue happend on both Win7 and Win10 (both x64).