I found out that when I'm watching a channel and I loose signal for a second (mostly encrypted channels) when the image comes back it stays bugged. Frames are not continuous and the audio is impaired. I need to change the channel to get back to normal.

The second issue is kinda strange, I cannot change the audio track on any channel even though multiple tracks are shown on AUDIO menu, but If I stream ATV to my MAC with VLC the audio track change actually works!

I'm using the latest build openatv-5.1-wetekplay-20150810_sdcard.zip