Hello,
it seems that the latest update of Plex (Windows ) 1.4.3.3433 the tag “Originally Available” does not work any longer like before.
I have many audio-streams (like Bibi&Tina) for my kids. Due the fact that I want to have always the latest stream on top I haved used the tag “Originally Available”. I have tagged with the tool mp3tag all my streams with the tag “Year” i.e. 2016-12-11, 2016-09-21, 2015-07-12, 2015-03-12, etc… The tag “Album” was in this case 085-…, 084-…, 083-…, 082-…, …
This makes sure that the latest streams was alwys on top.
Now, it seems that Plex only use the year 2016, 2015, etc.
Now I see the following order:
084-…, 085-…, 082-…, 083-…
It is doing this in Music too. Albums from artists that released more than one album in a year go alphabetical within the year which is usually wrong. I also reverted back to 1.3.4