1. go to developer options and select restore to default settings 2. in developer options ,only switch on "Developer Options " , "Stay awake" and "use legacy DHCP client" 3.Then in" Wi-Fi advanced settings" Network notifications "Off" Keep wi-fi on during sleep "Never" Set network connection method "Automatically connect"

this is my phones current setting and has stopped my issue

please comment if this has helped you with your problem