So, once again… naming matters. Turns out that a typo in the series’ name caused the issue. When I had added the first episode of the most recent season, the title was simply
‘NCIS 22E01’ instead of ‘NCIS S22E01’. To make matters worse, when I tried to solve the issue by means of the Plex Dance, it not only didn’t fix the issue, but when I tried to rename the entire series by including either TheTVDB ID in the naming or the year, I managed to copy from the wrong (typo) season and then make the entire series wrong.
After looking at different issues, when ChuckPa caught this (obvious) mistake, wouldn’t you know, the entire series appeared as expected.
Bottom line: follow the naming conventions correctly.
