Welcome to the Community!
We were able to locate your account using your community details and tested the line.
There's no evident fault within the NBN line and the modem shows that it's been stable.
Are you using a WiFi or a Wired connection? When you experience the connection dropout, did you notice any changes with the modem lights?
If you are using a WiFi connection, then the dropouts may have caused by signal interference. We've created an article that will guide you on how to improve your home network and lessen the signal interference issue.
Let us know how it goes.