Twice during the VOD movie on Roku Premiere 3920RW (Roku Premiere (3920 series) ), I noticed changes in volume at specific times. The volume decreased, followed by popping sounds for a few minutes before reaching 0, and then it suddenly recovered. However, upon rewinding and playing back, the issue did not occur at the same points. On the other hand, I have tested 15 different movies from various providers on Roku Ultra 4880X (Roku Ultra (4800 series)) # and have not experienced any volume-related proble