I have an Airtel fibre connection in Gurgaon (India). I installed Deco M5 in January 2024 to extend the coverage in my house. It was working fine until yesterday when i started getting patchy network in my wifi. It kept disconnecting. The Airtel (ISP) modem works fine if I disconnect the Deco device, however, the moment i reconnect Deco to the Airtel modem, the ISP's modem also stops working and says no internet available. Have tried multiple times since yesterday to no avail. Please help