Lightroom only processes currently visible photographs after import

To import I create a specific folder, copy the photographs there from the card, remove the card reader, start Lightroom and import from the folder. Lightroom then does it's thing where it processes each image, darkening each one as it goes. But recently it has started only processing the images that are currently seen in the Library Filter.

To process the next group of 120 images, I have to scroll down to make them visible. I can tell this is happening because aside from the visual indicator of Lightroom darkening each image as it goes, a process monitor shows me the CPU is working hard to do so. It stops when it reaches the end of what's currently visible and will go no further. I know that it used to batch process every image in there, whether I was looking at them in the Library Filter or not.

As you can see in this screenshot I have apparently selected Minimal build previews. Is this what's causing it? Will switching to Embedded/Sidecar or Normal fix this? Or is there another setting somewhere that's causing this?

If you take a look at this screenshot you can see the currently viewed images in the Library Filter. If I had just finished importing, Lightroom would only process those images. For it to process any others, I have to scroll to have them show in the Library Filter.

What setting can I change that'll make Lightroom automatically batch process every single photograph whenever I import?