ISSUE WITH THE PRINTING BOX: Why does the dimensions and coordinates keep shifting on its own?

I've seen a couple of people complain about this very issue online. 

In the "View Options" settings in the product builder of a specific "view",  I've set up the printing box to act as the boundary box if an element does not have an individual bounding box. I've also given the printing box set dimensions of 604 x 604 in the "View Options" settings. 

Once I've set up all my layers, etc., I click on "Save View" and then check the printing box size and coordinates by clicking on the "edit printing box" icon, one last time to ensure everything is in place. I save the view again.

When I navigate to a different page and open that same view in the "product builder" again, the size of the printing box in the canvas-section has changed by 1, sometimes 2 units, and the coordinates have shifted. I position it in place once again, and save the view again.

This same issue happens over and over and over. I'll set the printing box size & coordinates and save, then reload page, and repeat the process on the same view again and again at least 5 times until it no longer shifts around. Then I'll duplicate that view say, 5 times, and none of the duplicated views' printing box size and/or coordinates are consistent...

This is a massive problem in my situation... FPD, please fix this issue ASAP :(