appearing bar via airplay

When I airplay movies from a router attached drive to apple tv 3 I get a small bar (looks like a half pause bar) every 10 seconds which lasts for about 1 - 2 seconds. What does that mean and is there anything to switch of?

Sorry, forgot to mention that I stream with ipad Mini and latest firmware on both ends.

I also get this sometimes. I’m pretty sure it’s to do with subtitle settings, as the small bar is in the same position as the bar subtitles sit inside. Only get it on one or two films though.

There might be a funky subtitle track embedded within the video that is causing this.

Can you try switching off ‘Show Subtitles’ via the Playback menu or the main Infuse Settings menu to see if that helps?