DTS PlayFi and Definitive Tech connection issues?

Hi, new member here. Does anyone have any experience that might help me understand why I've had consistent connection issues using PlayFi with my Definitive Studio Micro sound bar? I listen to Pandora and iTunes. Sometimes it won't connect when I turn it on and open the app, other times it might play half a song or less, other times it might work for a couple of hours then drops the connection. It's intermittent and there's no real pattern to the failures. It's 4 years old and I've had the problems on and off since I purchased it, but it got much worse after I installed a Google WiFi mesh system recently. Also the bar works fine with my Smart TV but only with an optical cable; can't get it to work with Bluetooth. It's so unreliable that I'm thinking seriously of trashing it and going back to a wired system i.e. receiver and wired speakers. Any ideas or suggestions? Support from both companies has been severely lacking and I've given up trying. Thanks in advance for any thoughts.