Ah, so that's it.

During my visit to the Amazon site, I also bought a big jar of honey. I was surprised to see that the vendor is Polar Specialist Coatings*, a company that manufactures and supplies industrial and domestic paints and protective finishes. Should I be worried?

*really

maybe they didn't manage to score a lucrative crony PPE contract so they've branched out into honey?

It may be contaminated with paint thinner. Otherwise no worries.

Also: https://www.bee-america.com/content/how-detect-fake-honey