A couple of weeks ago, one of my friends experienced the same problem on a Roku TV. She unplugged it, plugged it back in, and the problem was solved. I haven't experienced this problem on any of my devices including Firestick 4K. I pay monthly for Premium and love it. I don't have cable nor Spotify. I am still considering punting Netflix.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated