Removing Photo From Album - No Longer An Available Option?

I feel like I'm going crazy. For the longest time, I had no issues with removing photos from albums after adding them. You could hit delete, or remove from album, and it would let you know that the photo would be removed from the album but you could still find it in "All Photos."

Today I tried to remove a photo from an album, and I cannot find the option to do so... it used to be so easy and intuitive that I didn't even have to think about it, but now, for the life of me I cannot figure out how to do it. I have options to add photos to albums, and to delete photos entirely from Lightroom, but no option to remove photos just from an album.

From the few online tutorials that exist since it's such a simple function, pressing 'backspace' or 'delete' should open the remove from album pop up. However when I press either key, I get the invalid input feedback blip. All other functions and keys are working fine, so Lightroom isn't stuck, those buttons just aren't doing what they did...

Yesterday I installed the new Lightroom update, and that's the only thing I can think of that might have changed from when I could remove photos from albums, but I can't fathom why the update would take away that option.

Does anyone know more about this, have a fix, etc.?