OPTIMAZATION – Clients experience lag in multiplayer games, I have started to track down and fix a few reasons. It is not perfect yet but much better. Cars would stutter when driving, delay in shooting projectiles with guns, things of that nature.
BUG FIX - AI Markers on the map when found were not showing up when clients load game in MP.
BUG FIX - Was able to delete a Gun Safe used in a quest.
BUG FIX - All car engine sounds were not being heard by the client when the server player was driving it.
V6.08 Update
Source: Steam Community (opens in a new tab)