Client Disappear?

Hi all…
Can i know why when i use a cast to all, all my client disappear? I mean, my possess? Cause the player is still there, but my controller is destroyed i suppose(I return to 0,0,0 with the clients)

Plase, can someone tell me why all the clients disappears?

Please, help me

Its’ a bug?

Please, i need your help

Now i understand that the client disappear when i call the multicast fuction… Why?