Other players invisible after /tp @a x,y,z

I just teleported all players via
/tp @a -229 66 119 and now I can't see the other player anymore. I can hear him run around and see the doors get open when he clicks it but no one can see each other anymore.

/Update: After the other player died I can see him again after teleporting him to me via /tp OTHERPLAYER Myname but he cant see me.
And when I kill myself with /kill I cannot see the other player but he can see me.