When I open either my system messages, or the recent photos the box is now stretched out vertically. It is not a problem to me for the system messages, but when you open a recent photo, you only get about a third of the photo with a slider bar. I then have to pull the corners to open up the box and move it around on the screen until I see the entire picture. It makes it a lot more labor intensive to see the new additions.
I am on Windows 10 if that makes any difference. I first noticed this problem yesterday (Aug. 11), and it is still the issue today.