Well, now I’m back on my original device (laptop), and I see the color too. Maybe it was legit white there for a bit, like a partial file upload that somehow finished?

Surely that’s it. All the other comments, all the upvotes for my comment, yes, all the evidence points to that. Indeed. Surely. Indubitably.

… and yet. I prefer the alternative facts explanation that I am simply a crazy person:-P.