PSA 9.8    Superman Red and Blue #2 June 2021 (David Choe Variant) 

Bottom Right corner has what looks like a crack in the acrylic. IT IS NOT A CRACK!

There is a strip in the edges for sealing. It folded over on itself in the corner and looks like a crack. Check pictures 

Picture 3 is zoomed in from front.

Picture 4 is from reverse side. You can see the "glue strip" used in sealing folded over on itself