windows 8 - An error occurred while connecting [drive] to [share]. The local device name is already in use

I map a network drive from a PC (workstation) to another PC (server), that is always on.

When my workstation sleeps and comes out of sleep, I get this error message:

An error occurred while connecting [drive] to [share]. The local device name is already in use. This connection has not been restored.

I get one of those for each explorer window I had open pointing to the network drive.

If I go click the network drive in My Computer, type G: in explorer or really do anything to access the network drive, everything works great again.

How can I avoid this happening?

Both PC's are Windows 8.