Nested background shapes causing slowdowns

WIndows 8.1 Pro, Surface Pro.

I have a document with 27 note objects, 22 of which are connected in a single chain.

When I create background object around some of the objects, there is no problem.

When I create a second background object the next outer layer of objects (the first background object is contained), all operations on this outer background object (resizing, selecting border types, etc.) are greatly slowed down. It can take several seconds to resize, etc.

Is this a known issue?