Asi air disconnecting and going idle

This links to my previous post about the ASI air where I talked about my issues with it disconnecting halfway through the night and stopping imaging.

I have now got an ethernet cable which is wired into the Wi-Fi router and then into the asi air and the same thing happened again today I fell asleep around 11 pm and woke up around 3 am and I had no images between midnight and and 3 am my asi air was connected via ethernet and it still managed to disconnect it isn’t a problem with the cables as when I turn it off and on the camera works. Does anyone know what’s happening? Thanks..