Scrobbling multi-episode files via Plex

I’m sure this will have been asked before, but I’m struggling to come up with the correct terms to search for.

Is there any way of getting the Plex scrobbler to properly scrobble when you have two (or more) episodes per physical file?

I just finished the first four episodes of Beavis and Butt-head season 8 and when I checked Trakt’s history it showed I’d only watched episode 1 and 3. I had to manually add in 2 and 4.

Is this just an issue I have to manually deal with?