This isn't that important a feature most of the time, because you can just press the skip-ahead button and skip the next 30 seconds. You might see some of the intro, but big deal
There is one big exception though: if you're watching Star Trek: Enterprise. The "skip intro" feature is invaluable so you don't have to be subjected to that truly horrific opening song.
There was something that worked, going forward the core team decided to focus on a tight stream lined core and decruft 'features'.
Discussion:
https://old.reddit.com/r/selfhosted/comments/1dbiw90/skip_in...
https://forum.jellyfin.org/t-intro-skipper-project-dead
Seems like a temporary (indefinite) suspension and a storm in a teacup from those attached to the feature.