Table of Contents Breaks When Deck of Cards Macro is Used

We recently converted our documentation to use the deck of cards for easier navigation, but unfortunately this broke our table of contents on the same page.

There are a couple of workarounds (see comment), but they are very messy and not sustainable over the lifespan of the page. If someone creates a new page, for instance, the workaround ToC does not update.

Repro:
1) Open a page with a working ToC
2) Add the Deck of Cards macro
3) Add Cards for the number of headings you need
4) Put top-level headings into each Card under Deck of Cards
5) Save. Note that the ToC now only works if selecting items from the currently open card.