I can't clearly see what's going on there. Is the top edge near your fingers not rigid? Is it because the walls haven't adhered to the infill? How much infill are you using?

I think I also see a the problem along the upper left edge. Is the top of that edge parallel to the build plate, or at an angle? I'm thinking that if it is at an angle, what I'm seeing is delamination probably caused by poor layer adhesion and warping.