Extremely frustrating! I have a fully automated smart home and bought some Samsung TVs & Soundbars assuming they would seemlessly integrate with Alexa, like everything else in my house does, but every day at least one of the Samsung devices goes offline for no reason. Today they're all offline 😪 If I could afford it I'd throw them all in the trash and buy something else that works properly.
You have my sympathy. I found similar problem with wifi losing connectivity, needing the device to reconnect. A couple of things to try as a temp solution, daily restart of the device, much less likely daily start of Alexa control device. Google "samsung devices lose connection with Alexa" for some suggestions.
I'd recommend something that doesn't use WiFi. Zigbee etc would be better choicses. I currently use other branded smartlights that run from WiFi, i used to have similar issues until i moved my access point (router). WiFi signal tends to have issues when you have 30+ devices running from it at any given time (not sure what your situation is like)
