[Karellen]

Stranger Things2
Stranger Things3
season1

If you look at this page, you can see the seasons have been named that way, so that is what Kodi scrapes... https://www.themoviedb.org/tv/66732-stra...gs/seasons
(though personally I don't think seasons should be named that way. It should only be used for official season names, not made up ones like in this instance.)

If you check your tvshow.nfo, you will see the following tags. Just delete them (or change them to whatever you perefer) and refresh the show

xml:
    <namedseason number="1"></namedseason>

    <namedseason number="2"></namedseason>

    <namedseason number="3"></namedseason>

    <namedseason number="4"></namedseason>

    <namedseason number="5"></namedseason>

Alternatively you can rename them in Kodi... https://kodi.wiki/view/Season_rename