VNC Service not staying open.

I am thinking since the issues with Spectre/Meltdown we are seeing the VNC service drop periodically. We do things different I have at any given time 50 to 60 Macs staged. VNC is turned on so that we can connect to them at any given time. We have seen some stop the service, and I have to go back in and unload then reload or reboot the machine to get the service to allow connections.

Nmap shows the service as filtered when we are unable to connect.

I have stood up a Mac wit the vnc service running on 5909 and it has never failed.

So my question is: Anyone having this same issue? Is there a way to drill down into the "service" to see what is causing it to refuse connections?

As a side note the last one that failed has been online 13days and stopped letting us log in today.

Hardware used:

Various Mac Mini Models 2012 2014

i5,i7, 4, 8, 16 GB RAM, 500, 1TB, 250, 500GB SSD & Flash