My desktop is connected via ethernet to my router. When my computer comes out of standby my nic says I'm not connected to a network. It takes a good 5-10 minutes for it to reconnect. I've even hardcoded my IP but have the same problem. I try to manually connect in the Network and Sharing Center by clicking "Connect to network" which seems to do nothing. Only way I've stopped this is by stopping my computer from going to standby at all.

We have some known issues in the Beta build with connectivity when resuming from hibernation and standby for certain NICs. As a workaround, disable power management functionality for the adapter to prevent it from being shut down. Access the properties of the adapter, and on the Power Management tab, uncheck "Allow the computer to turn off this device to save power". Ned Pyle [MSFT] - MS Enterprise Platforms Support - Beta Team