Certain apps can have dropout issues. My Roku plugged in to the TV, just to upgrade it to a smart, has no problems. My main TV connected to the Yammy on the other hand does have HDMI audio issues with its apps.
Netflix and Amazon have both exhibited repeated audio drops, usually a second or so. Playing through the TV speakers its never a problem, but via ARC the drop can be every few minutes, it's annoying but no need to reset anything. I switched the audio to optical and the problem seems gone. I also get a problem when both the TV and projector are both on at same time. It usually only happens once after a minute or two and once the TV is off it doesn't happen again. This is from an external Media PC source. It has not happened with just the TV.