XBox One - Regular disconnects - NAT Type unavailable error

I have browsed these forums for solutions about xbox connectivity issues however i have tried many of them and gotten no results with stable connections.

Issue:
Xbox Live disconnects randomly

RouterOS:
RouterOS v6.39.2 (stable)
Config: Home Dual AP
NAT Enabled
Upnp Enabled

Can you please assist in router config for stable operation?