1.12 players now see these tutorial toasts apparently, which is incredibly annoying. The problem is that they don't go away unless the player does what it says. As far as I know there's no way to disable this from the server right now*. Plugin developers should be able to send some sort of packet to the client telling it to stop showing tutorial toasts. Sadly this is something we'll have to convince Mojang to do. Not having an option to disable this is a big problem, because these toasts are very annoying. * Based on a quick look at the Minecraft protocol wiki EDIT: I didn't really know where to post this, I thought it was best to post it here.