I'm using firmware version 20160202-1958 and this issue is occurring for this version and the one before, presumably 20160123.
I'm able to tap to play songs listed under the "Library" tab. However, I cannot do the same for any song listed in any of my playlists. I can't tell if it was working since version 2.0 (whatever that means, I have no idea where to check) as I've never tried using playlists before.
Also, after upgrading to the above firmware version. All songs in all my playlists disappeared and I had to re-select which is extremely disappointing.