Thank you for replying.
It is a diagram drawn in Affinity Designer, and yes, I used "shift" as stated.
I kinda get what it's doing now. When I was double clicking on it, it restored the diagram to the proper ratio, which was the correct one on a previous diagram I used it on, but I had reduced the ratio on one side versus the other, but it's what I wanted, for this diagram. I ended up cropping the diagram, which was just cross hatching, and the error went away.
Thanks. What you said actual did help me see what was going on.