I added my  Q990C sound bar to my smart things app and was able to use it to control the sound bar for a day or two. It worked fine on my Apple iPad  and Pixel  phone. The Wi-Fi signals are strong. After a day or two the Q990C does’t connect to  my Wi-Fi router. I tried this on 5GHz and 2.4GHz bands with same results. I automatically reboot my router every night. Any ideas what is causing the problem?