iTunes/Music Home sharing does not work on my iPad Air

No matter what I do I cannot use Music.app on my iPad Air to play music from my iTunes Library with Home-Sharing switched on. The Library name correctly appears in the Music.app source list after the loading symbol takes an age to complete. When it appears to have connected to the Library on my Mac, contents of my Library are shown in the app but I cannot play anything. If I select an albumn and press Play the Music.app merely cycles rapidly through all the track titles of the Album and then stops. Nothing plays. I've tried dozens of times to get this to work, even rebuilding my iTunes Library. Nothing seems to cure the problem. I can connect and play via Plex which is just plain daft seeing Apple designed all the software/hardware but they, themselves, cannot correctly code for this basic functionality.

Also, not all Album cover artwork is displayed correctly.

It seems many of the things I bought the iPad for are non-functional and the tablet is virtually useless. I can't beleive Apple would produce software and hardware which is specifically made to work harmoniously but obviously doesn't.

Any help, here, please?

I'm also having problems with Bluetooth connecting to my Mac Pro (2008)... Namly, it will not.