I'm also experiencing some severe stability issues with Photo 1.10 that weren't there in 1.9. Designer and Publisher seem to also be fine as far as I can tell, though I haven't used Designer much since 1.10, so I'm not 100% sure on that one.
I've specifically experienced severe slow-downs when resizing/resampling images and merging multiple layers, to the point where it makes the music I'm listening to start to stutter, which never happened before 1.10 (I'm on a gaming computer, so I don't think hardware resources are the problem). Also one time when I was trying to work with several layers to stitch together multiple images, the drag-to-move function on the move tool just stopped working altogether and I had to restart Photo. I'm considering trying to roll back to 1.9 for Photo until the next update or something.