Update whats-new.md

updating what's new

Author: cfields475

articles/virtual-wan/whats-new.md

@@ -101,6 +101,7 @@ The following features are currently in gated public preview. After working with
 |10|  DNAT traffic is not forwarded to the NVA after associating an additional IP address.|After associating additional IP address(es) to an NVA that already has active inbound security rules, DNAT traffic is not forwarded properly to the NVA due to a code defect. | November 2024 | Use partner orchestration/management software to modify (create or delete existing) configured inbound-security rules to restore connectivity.|
 |11| Spoke Virtual Network address space updates not picked up by Virtual WAN | Multiple concurrent updates on spoke Virtual Network address spaces are not properly synced with the Virtual Hub. | November 2024 | Ensure address space updates in a single Virtual Network are done serially. Wait until the first address update is properly reflected in the Virtual Hub's effective routes before updating the address space of the spoke Virtual Network again. If this issue has already occurred, make sure to update the address space of the affected Virtual Network with a nonimpacting address space (wait about 20 minutes before attempting again). Once this is reflected in the Virtual Network AND in the Virtual Hub, update the Virtual Network address space to the preferred Virtual Network address space.|
 |12 |Unable to update route tables and routing configuration (propagated route table and label)  for on-premises (VPN, ExpressRoute, NVA) connections. | When a Virtual WAN hub and its gateway(s) are in different Azure resource groups, updating routing configuration results in a "resource not found" error. | March 2025| This issue is caused by a code defect in Azure Portal. Use Terraform, PowerShell, CLI or REST API to manage your Virtual WAN deployment.|
+|13| Hub will not advertise routes to VPN sites | When a customer uses Route-Maps for the first time it triggers an upgrade. After the upgrade is complete, If VPN sites are not advertising routes to the hub, the hub will not advertise routes to the VPN sites. | December 2024 | If the VPN sites start adverting any routes to the hub, the hub will start adverting routes again.
 
 
 ## Next steps