Hi Steve,

As a ham radio operator, all I could say is that at RF (and especially very high freq RF), if
you make
a ground a significant distance away (in relation to the wavelength of the RF signal) it
becomes NOT a ground. Getting ground CLOSE to the point being grounded
is essential.  At DC, it doesnt matter...ground's ground as long as there's ANY path
(within reason) to get there.

That'd be my guess.

Happy VF (Virtual Friday!)

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