TV shows with only one season available are not showing season-level extras in Android or iOS clients (I suspect all clients currently supporting season-level extras, though).
If another season is added, the missing season-level extras show up in the clients. It looks like what happens is the series-level extras clobber the season-level extras if only one season is present. It doesn’t even matter if there are series-level extras or not: the season-level extras still get clobbered if only one season is present.
Now, there are TV shows that only ever had one season and there are TV shows in which you only own one season. The former’s extras need not make the distinction between series and season but the latter’s extras are still very much season-specific. I happened to have pinned this problem down on a case of the latter but even if I had been working with a series with only one season, I wouldn’t want any clobbering of any extras at any time. When only one season is present, the desired behavior is one of collation, not clobbering.
This is a follow-up to an older post of mine. I hadn't realized the single-versus-multi season nature of the problem at the time.
That should depend on your configuration.
If you configured your library to collapse/hide seasons if only a single season is present, you’re basically at the show level, when displaying the episodes.
You should be able select Show Season from the episode’s context menu, though – which should list the season and its extra.
Indeed, I do have the library set to collapse single seasons. Enabling that option shouldn’t justify hiding registered content, though. When that option is enabled, the show-level and season-level extras should combine and be presented together at show-only display level. It’s still a bug…
