When I try to play with friends (while not being host), I encounter serious server lags but only from my point of view : any action I do like opening doors or breaking locks is in sync from their pov but it takes like 5-20s from my pov (they walk through the doors I open while I still see them closed).
What's more, when I host the game, it's the exact oposit : I see no lag from nobody but all my friends encouter the desync problems.
I've tried re-starting the game or re-joining the lobby, even re-installing the game and nothing worked.
It doesn't seem like it's a network problem as all my friends see my action exactly when I do them, I also see them move at the right time. Only interactions like opening doors, breaking locks, picking up stuff, killing sleepers, or voicelines are super delayed.
#Server sync problems only from my pov
scarlet verge
unreal mauve
if u have any quality of service software like asus gamefirst or the like, make sure steam is top priority game
also if u doing port forwards on router instead of upnp, i recommend upnp instead
sounds like your network packet receptance is detoured / delayed due to somethnig (sending side is okay like u said)