Not sure if this should go here or under the server section. I noticed this on the web app and the apple tv client.
When selecting a show, the next up area does not show a special that is aired between 2 episodes.
If I click on the season for the show, it correctly displays the special between the episodes.
In the screenshots, you will notice that Next Up is not displaying the Christmas special between episodes 8 and 9 but the season screen shows it.