If you notice when the multiplayer sync stutter bug hits the offending nametag will flash LOL. Server is having issues sycning certain players and the end result is stutter. It does not effect all players on the server only specific players in the group/general area. There is no known work around other than to disable multiplayer or switch to another server and hope that you are ok with all the players in your area.
This leads to another question about why syncing issue is occurring on a dedicated server. Seems like a back end issue with the last update. We have checked to confirm this happens with empty community folder and it indeed does. This bug should be bumped to high priority as it can effect anyone in multiplayer at any given time on any given server.