sounds like a routing problem, I bet if you do this it will get you a new ip and a new route.
Actiontec MI424-WR 1 Click on MY NETWORK icon at the top. 2 Select NETWORK CONNECTIONS from the menu on the left. 3 Select BROADBAND CONNECTION (coax or ethernet) depending on your connection to the ONT. 4 Click SETTINGS 5 Click RELEASE 6 Click APPLY 7 Disconnect the router immediately to prevent it from re-requesting a DHCP lease.
Leave it disconnected for AT LEAST 5 minutes preferably 10 and then reconnect it.
If you reconnect it too fast, it will grab the same route, same IP and you will be in the same boat.