I'm on 7.19.1
the jog wheel, and skip forward/back were not working. I rebooted the appleTV, and now both work. before the reboot, even force quitting Plex didn't fixe it.
Thanks for pointing this out, because the skip was driving me nuts, I had to get the phone out a couple times today. Watching a show with occasional thick accents, and missed some words here and there. it would show the skip icon, but not do anything.
Plex does not generate a thumbnail as you scroll, most apps do that. Plex just shows the pointer moving on the timeline, and then once you hit play, you see where you are. so trying to find something visually doesn't really work.
The Infuse app will connect to your plex server, and it does generate the thumbnail.
and just a note, when you want to use the jog wheel, touch the wheel, hold your finger still for a moment, till the wheel icon shows on the screen. If you don't pause, it won't work.