Inserting children display macro on page, but edit screen does not show

[GMan Working]

I have a parent page with multiple child pages, when I try and insert the "children display" macro on the parent page, the spinning circle / cursor keeps spinning, and the configuration window for the macro never shows, just a consistent spinning circle.  This macro used to work in 6.X,  It should be pointed out, that we upgraded to 7.5.1 a couple of months ago, and I don't think this issue was discovered then, but has been as of recently.  Today I even tried upgrading to 7.10.2 in hope that it would be resolve, but no such luck.  I've googled and will continue to search for some other team with a similar problem, but haven't found one as of yet.  I guess I could be the first to discover this problem.