When opening chat the hotkey gets added as the first character every time.

The recent snapshots have been displaying an irritating glitch with the chat bar. If you open chat with the [T] key you'll get a "t" as the first character in chat, which you have to backspace. If you open chat with the / key you'll get "//" in chat and you'll have to backspace once before you can start typing a command.

When I change my launcher to play in 1.12.2 this problem goes away completely. When I play on 18w08b (and the last few snapshots before it) this happens every time without fail when opening chat.