[gonzo]

It's not a gum or wax stain. When I touch the card, those spots don't feel any different than the rest of the surface of the card. The card didn't get wet in my possession either. It went in a penny sleeve right away because of the odd look.

I attached some higher-resolution scans.
Those spots look more smeary (for lack of a better term) than the rest of the print dots.

The last scan shows a blue dot behind Plesac's neck that has a similar look to the "rash". It's not there on the other Plesac.

Maybe the card had a few tiny dots of water on it as it was printed, smearing out the ink dots?
That's my guess right now after looking at the better scans.
But if anyone runs across another one like this, I'd love to see it.