Uh - no - I've had other creative things happen, but not that particular one.
It looks like there is too much fabric in that lower one. The only thing I can think of to fix it - if you want to - is to take out ALL the binding stitching about six inches on one side of the corner and about 12 inches on the other side (including that corner) - and redo that part of the binding. I am guessing that you will end up with about 1/2 inch of extra fabric that will need to be taken up in a seam in the binding.