The upper left volume control is very finicky with my iMac but seems OK with a Raspberry Pi Linux and Windows versions. Also, the Windows, Linux and Mac version keep playing a tune on DLNA even though I exited MC (for a long time). Can you stop playing as part of the shutdown?
Also, when I do a Mac "Update Channels," MC doesn't close and I have to force close MC. This doesn't happen on the Windows version.
I also have only one source and it's DLNA. I'd love to have it as a default and can't for the life of me figure out how to do that. When I start MC .... I default to the computer speakers.