Two times now in the last week, I have resumed my MacBook Pro Retina from sleep and upon browsing to my Windows 10 VM, it is unavailable with a red question mark and no ability to manage the machine. (Note: this is the only VM that was currently powered on). Both the full screen view, along with control center show that red question mark. My only choice with the machine is to 'remove'. I have to force-kill the VM in Activity Monitor, quit the application of Parallels and reopen. Upon this, it launches fine. Any thoughts?