Welcome to the Community @14settlers
For customers experiencing any issues with their NBN service, we recommend the best thing to do first is check if there's an outage on the NBN network.
If there are no known outages in your area, customers can proceed with the troubleshooting steps indicated on this link : https://www.tpg.com.au/support/nbn/problems_connect_internet_nbn
In your case, your service was affected by a POI (Point of Interconnect) outage. The fault within the POI was resolved by the attending technician and your modem shows a stable connection for almost 3 days and counting.
If you need further assistance, please let us know.