Jimmy:
If you don't get anywhere with the mfg., you did find a "fix". IF you have a ballast 'in stock' you may want to swap it out to see IF that is the 100% cure.
Perhaps Greg has some input on ballast leakage to ground?
I can say I never came upon this issue in my 'tool days', and the majority of the HID lighting I worked on was 208 to 480 volt.
