Macro Page Designer - Nested Pages/Sub Pages

I have been trying to create sub pages of pages with the page designer, without much success. I have created new menu buttons, variables, etc within my top level pages(working perfectly), and gotten the sub pages to work temporarily, but they seem to stop working after modifying anything.

The use case is having different pages for wavetables, filter, envelopes and fx for the zones, which are the top level pages.

Is this a limitation of the Page Designer?

No, you can put stacks inside of stacks.