Changing client camera rotation on server?

Hello there.

I Changed the camera rotation of the client player with the PlayerTickEvent, but it only works on singleplayer correctly, the camera rotation should be changed until the player is sneaking, but on the server it only works until I click a block or an entity or something like that. I think I'm missing something for server handle, but I don't know what.

My code looks like this:

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@SubscribeEvent

    public void onPlayerTick(PlayerTickEvent event)

    {

    if (event.phase == TickEvent.Phase.END || event.player == null)

        {

            return;

        }

    // Once every second

        if (++this.serverTickCounter >= 20)//20

        {

            this.serverTickCounter = 0;

                  if(event.player.isSneaking())

    event.player.setPositionAndRotation(event.player.posX, event.player.posY, event.player.posZ, 10, 10); //10, 10 just looking if it works

        }

        ++this.playerTickCounter;

    }

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