I think there's still problem about stuttering live tv. This time it's worse than Jarvis build though.
I will try to reproduce problem and get a log if I have time. Just to make a quick note here to see if someone got this issue like mine.
When playing live tv for a while (not long, maybe 10-20 mins.) the video stream will get buffering and a/v out of sync. When this happens it's permanent. Stop channel and play again won't solve until reboot. But remote clients (via tvheadend service) still play from the box without any issue.