For some reason the Detailed section for rejected strategies does not center the window when SQX is half screen. The detailed section for accepted strategies does center the window though so thats why I believe this is a small UI bug.
I just realized this popup window could be moved, so its even less of an issue. I don't believe I moved it into the most left position originally so it would be nice to auto center on opening it but its not that big of a deal now that I know it can be moved so this task can be closed if you dont want to bother with auto-centering.
Monitor resolution is 1080p and I was using half of the window. I also did not drag it with the mouse, I only shortened the window by half. Regardless, I don't think its that big of a deal as the window can be moved manually to the center of the screen.