Subtitles freeze at specific point
I'm using 3rd gen AppleTV via AirPlay to stream html5 videos with vtt subtitles to my TV. And i always encounter the same problem - subtitles stop showing at a specific point of time. I've prepared the demo page demonstrating this problem: http://ravwar.github.io/. At exactly 7:50 after the cue "but much better looking" the subtitles disappear. Inside the browser - subtitles work fine throughout the video.
I've tested this problem with different videos and subtitles. It's always present, but depending on subtitle contents - occurs at different time points. Removing some cue words - shifts the problem by a couple of seconds, so i think it's tied directly to the subtitle contents. Maybe it occurs at the exact byte-size.
Would be grateful for some feedback.
Apple TV