My game is glitching really bad

[Angrygrandpa]

when someone moves, they will move forward and then port back and repeat this cycle for awhile. When i try to loot corpses, it takes quite some time to actually loot and move. ill consider someone to see what threat they are and then everyone disappears. I don't know whats going on. please help[You must be logged in to view images. Log in or Register.] thank you