DNN Listener resolving to a secondary server in WSFC & AO AG

I have an Azure AO AG which consists of three servers (all WS-2019 & SQL-2019 CU8): - A - Subnet 1 - Principal Server (Sync) - B - Subnet 1 - Secondary Server (Sync) - C - Subnet 2 - Secondary Server (Async) I have created a DNN Listener on the resource which looks to be up an running but when I connect to the Listener it resolves to server C. I have confirmed that in the cluster and AG, server A is the principal. I have tried failing over to server B which seems to work fine but the listener still only resolves to Server C. I pulled out the Cluster Logs and I have a warning that jumped out to me that does not seem to appear on google: 2020/11/12-15:27:48.720 WARN [RES] Distributed Network Name : Configuration: Obtaining exclude networks failed with error 2.