im not sure about this bug?

I think some people cant see me or something in pvp world. but noobs are attacking me so only some ppl are attacking me epislen claimed he couldn't see me and mattsirbait claimed he couldn 't see me. plese help.posting this so i dont get in trouble

 

I jsut walked into pvp and i was taking damage from no one around..

 

i dont have any mods installed atm i just finsished uploading a video.