Windows Network & Sharing - Network Map

With Comodo installed, despite allowing all communication for my trusted Zone Home Network, the Network and Sharing tab in Windows 7 will not map the Network when I click ‘See Full Network’. Rather, I get the error message : “Windows cannot create the network map. Responses form other devices on the network are delayed or there is an incompatible router on the network”

The mapping works fine when I uninstall Comodo Firewall.
But, I don’t want to be left with just the protection of Windows Firewall.
Again, I have allowed all communications with the trusted zone

Is this a bug in Comodo Firewall??
Any suggestions ?