Inviting People to Practice Tool Custom Games?

It has come to my attention that you can invite people to the Practice Tool custom game to the slot where you normally put in a bot. And when you try to start the game, it gives you a prompt saying the following:

We encountered an unexpected error trying to start your custom game

I think the bug here is that you're able to invite people to the custom game, which in reality, you shouldn't.

I think Riot should address this issue whenever they can, because to be honest this did feel like a slap on the wrist to me