Samsung and Hulu and Netflix need those calls to know it's not working.

Please read to the end so you know what's up. Think of your Windows PC with apps from others. Just like your PC this TV has apps from other companies and if they don't get it right, things like this happen. This system of maker and supplier of apps is relatively new to TVs. Before we only has the TV and suppliers of content.

OK. Look around and see if there is a setting in Apps and TV to produce stereo. Most sound bars do not produce sound when fed 5.1 or more than stereo signals.

Try that.
Bob