Mp3tag multiple genres and plex

I’ve already looked up the other posts, nothing seems to be working.
So far I’ve tried genre1 \ genre2
Genre1; genre2
And also adding an extra genre field with no luck
Plex either reads the whole thing as one word or it only reads the first genre
Anybody actually got this working

I’m on latest version of both mo3tag for Mac and plex

here is a post that shows an apparently successful way: