Retina images and screenshots no longer pasting or importing @2x

Just today I have discovered that something I have done hundreds of times no longer works. I have a Mac retina laptop, with a 27" non-retina Apple display. If I want a big screenshot of something, I take the screenshot on the laptop and then paste in Figma. The result would be @2x/double the dimensions.

Today both pasting, and saving and doing Place Image…. only produces the image @1x.

I confirmed that the saved screenshot image is @2x:

But if placed into the canvas it’s only @1x:

Also, working exclusively with the retina laptop produces the same results. Always @1x.

How can I get the actual image to import?