Structure Blocks don't Load Saved Structures from a Different World

When I try to load a structure that I saved to memory from another world, it recognizes the structure's size and name, and shows the outline of the structure (say, if the structure's size was x=3, y=4, and z=7, then the outline would be that dimension), but it won't let me load it. It just shows the load button as grayed out. If this was meant to be, then I recommend you change this and make it possible to load structures that were saved in a different world.