My Polk Audio Soundbar keeps disconnecting from wi-fi, as if there is no signal, then it reconnects

I have Google Fiber with the modem/router in the same room.... 10 feet away..... and my Polk Soundbar still keeps cutting out while it's playing Pandora. The Alexa ring is red, and if I ask her anything, she says "I'm having trouble understanding you right now".... as if the wi-fi has disconnected. Any ideas what I should try?

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