Scenes hang in Hierarchy after closing Pun basics tutorial game

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Hello!

I'm working my way through the PUN Basics Tutorial game/demo and very much enjoying myself! I have run in to one issue that I don't understand and cannot seem to resolve.

After attempting to run my game in it's current state after the "Loading Arena From The Lobby" step, I'm seeing some strange behavior. Firstly, when I exit the game after seemingly joining the room, my Hierarchy looks like below. I am unable to remove these until the decide they've stopped loading, and when that happens seems arbitrary.

Not sure why I'm not allowed to post the image but here is a URL.
https://imgur.com/a/JLB6NdG

Secondly, my Leave Game button doesn't actually do anything. I have my Leave Room function defined in my Game Manager however clicking it elicits no reaction. I've followed everything in the tutorial thus far to the letter except for placing my newly created files into a custom namespace.

Any advice or help is greatly appreciated!