Desync- and lag problems on your Valheim server
All data on the Valheim servers is sent between client <-> server.
If a single player is alone in one area, all creatures and objects are controlled and synchronized with the server through this client.
Even if a second or third player joins the area, the first client will still be the one doing the controlling and synchronizing. Therefore, the connection of the first player is crucial. If this player has a bad connection, the other joining clients will notice this as well. These are the lags and desync-problems some players are experiencing, even if their internet is fast and runs without any problems.
We are sure, that the game devs will find a solution for this problem.