The client still thinks commands are enabled when enabling multiplayer with commands and disabling it

Steps to reproduce:

• Be in a singleplayer world that has no cheats enabled and that is not published to multiplayer

• go to the multiplayer screen and enable multiplayer with cheats

• disable multiplayer

• Press F3+F4 to open the gamemode switcher, or open the chat and type / to see the available commands

Expected result:

The gamemode switcher is no longer accessible because the game is taken offline and the cheats where disabled with that action.

Actual result:

You can still open the game mode switcher (but cant change your gamemode) and the chat still tab completes operator commands.