Hosting a BDS on a Linux machine. After getting players on the server, an issue was reported where players will receive damage falling from heights they should not receive fall damage from. This would happen especially frequently when sprinting and jumping, when the player is falling an additional block, or even on an even surface. I believe the server is using a flawed method to calculate fall damage where the distance travelled is being incorrectly "added" to the total distance fallen. This could explain why the bug is common when sprinting as you can travel further distances when jumping. This tends to happen more often with additional players on the server as well. It seems like client-auth movement is not working as intended either?

For the game stuttering, I have no clue why tick rate/server related performance is dropping client FPS and making the game stutter for players when the worse that should happen with server performance issues is network related lag. Why does it seem like my client is completely dependent on receiving server updates for its own performance?