Sorry - didn't finish my post...dragged away by another customer.
Anywho - it turned out to be an issue with their amphenol cable connected to one of their media modules. Seems that when they use all 24 ports supported by the analog media module (connected to 2 D120's via patch panel) and reboot the server, it causes the media module to crash. If they only use 20 of 24 ports on it all it fine. I can't explain it and since it's not my issue I'll leave it up to them.