Rotating ONE photo takes a solid minute

I'm asking this because all searched topics for this result in dead threads with no answer. When I rotate a photo in my Photos app (ONE PICTURE), it takes a solid minute or longer to rotate. The pop-up that appears during this does say "Rotating photos" as in plural, but it's always just for one. This occurs at all times, regardless of which Mac I perform this on. I also have 4TB, but it's still downloading my library, so it could be that it's an issue with downloading it from the cloud first. Nonetheless, this is aggravating, and I hope there's a simple fix. I feel like there are so many basic things Photos cannot do quickly, which is why I'm at this point where I bought a 4TB MBP to download all my pictures to move them to another service.