This was also an issue with v3.198 & earlier? so its not new....
When you right click on a TV show you can choose to search for new episodes. If you left click on the plus so the seasons show, then left click on the season to select it, then right click back on the TV show, the option to search for new episodes is missing from the menu.
Not until you right click on another TV show, can you right click & see the option on the first show.