I had one Show that was not grouping by Season, just showing all episodes. All my other Shows were fine. This is what worked for me
- Click on the pencil
- Go to Advanced
- For “Season” choose “Library Default”
If you choose “Hide”, it will hide the seasons and only show the episodes. This was the setting my Show was set to, once I changed it to “Library Default” then everything went back to normal. If you want to override the “Library Default” grouping then choose “Show”
Also, if you wish to change the “Library Default”, then click on the three dots next to the library you wish to change. Pick “Manage Library”, then “Edit…”. At the next Window, choose Advanced then scroll down and look for Season and pick your the option you want.
Hope this helps.
Server Version 1.18.0.1944 (Windows)