Stop Turning off my Receiver

Not all the time, but enough of the time, while streaming a video, BAM, my stereo receiver is shut off. Kodi continues to run. I turn the stereo back on and the video is still playing. The volume always goes to zero.

This makes no sense. Its very annoying.

Any help or ideas?

This is a Amazon Fire Stick, Kodi 17.3v. Its done this on older versions as well.

Thanks