Linked Folder not opening in stacks? Bug

I have a network shared folder added to "Places" in Finder. I have also dragged a shortcut into the dock. The problem is that when I click the shortcut in the dock, the "stacks" doesn't pop up. Instead, it only pops up when I click a second time. After that, it works fine. It stops working after I restart the machine, so I have to click again for it to work.


So basically, it looks like when I click it the first time, it "makes a network" connection to my windows PC where the network folder is located. This looks like probable because the fact that under "Shared" in finder, the PC isn't listed UNTIL I click the mounted network folder in the "Places" in Finder.

Is this a bug?