Anyone got experience with Unifi Skyworth router + modem combo device?

Earlier this week TM suddenly replaced our existing Fiberhome modem (which was working fine) with the current Skyworth device. Since then, nightmare begin to happen, connection disconnect randomly sometime twice a days, sometime once every few days. When nobody home to reboot the device manually, files get out of sync.

Didn't manage to get through their 100 until now, keep suggesting to DIY through their app. Chat through their agent on app and all she does is restart the port but problem still persist.

Anyone got any tips that can configure the Skyworth so that it reconnect automatically when the connection drop?