Polk Signa S3

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I just bought a new Polk Audio Signa S3 35" Soundbar with Wireless Subwoofer from Costco and connected it with my fairly new Samsung TV using the optical cable. I used the learning feature of Samsung Remote and programmed volume up/down, Power and mute buttons. Everything is working. When I turn the tv and Soundbar off and leave it for a while, next time trying to turn the TV and Soundbar on, the remote doesn’t turn on the Soundbar anymore. If I use the Soundbar remote or power button on the Soundbar, it turns on and then the TV remote starts working for the power button. Something happens if the Soundbar stays off for extended amount of time. Any ideas what this could be?