Powering off / on my Receiver break XBMC video playback

This happen while watching LiveTV but I also tested and the same happen when watching a movie.

If liveTV/Movie is playing, and I power off my AVR ( connected to the PC via HDMI ), when I turn the AVR back on, the liveTV/Movie has no sound and the image is VERY choppy, like it's playing 1 frame per seconds, if I pause, play, try to fastforward or anything the video always resume in the same slow motion/choppy video.

I cannot change channel either, it keep playing the choppy video source.

The only way I found to recover is to quit the LiveTV ( stop it ) or stop the movie, then if I go back in in LiveTV mode and choose a channel it works properly again.

Some more info:

Latest Frodo nightly, Running on Windows 8 on a Nvidia GT 460, with latest Nvidia drivers.
The AVR is a Harman Kardon AVR354

I suspect XBMC has issue getting back in sync, is there anything I can do to fix this issue? It's not really a big deal for movies, however for LiveTV i often power off my setup while leaving the PVR running (playing TV), everytime I turn the TV back on I need to stop the video and start the channel that was playing again.

Thanks!