I can happily report Smooth Sync fixed my issue! It works almost flawlessly except for one strange thing: when the players are walking on the starting platform there doesn’t seem to be any interpolation happening and they look very jittery, but as soon as they walk into the main part of the level they are buttery smooth. Only the player who acts as the listen server appears jittery on this platform to the client connected players (to the server, everyone is always smoothly synced). This is really bizarre to me. The only difference is that the starting platform has a different material on the floor (tile, as opposed to carpet which is in the main area where it works). Would you have any idea what may be causing this? I can record a video later.