Ping Datasource periodic failure after Collector upgrade: any ideas?

Problem domain isolation: when the problem happens, if you are in a terminal window on the collector server (not the collector debug console), you can't ping the target device? If that's true, then you have eliminated one problem domain: LogicMonitor Collector component. If the server is having the issue regardless of what is installed on it, it's not what's being installed on it. I know it'd be a PITA, but could you standup a collector server and not install the collector to see if you still experience the issue? What about a tracert while the problem is happening?