Adding a bulk action to the Customers action drop-down doesn't work

Shopify Partner
25 1 0

I am trying to add a bulk action to the Customers action drop-down as per instructions on

However, if you select, Customers action drop-down as the Page to show link, it does not work.  Changing the Page to show link to Orders action drop-down or any other options works.  Is there a bug or is there something I could be missing?