I thought you might be interested in looking at (FPS drop/Freeze) Unable to run my homemade co-op mission in multiplayer, but work fine in singleplayer..
https://forums.bohemia.net/forums/topic/229205-fps-dropfreeze-unable-to-run-my-homemade-co-op-mission-in-multiplayer-but-work-fine-in-singleplayer/?do=findComment&comment=3407017
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