Block not showing on a matching path (menu item duplicate) I have a strange situation and would like to verify it with you.

I have a menu block of main manu level 2+ links.

Corporate     [&lt;--block title, level 1 of Main Menu]
  About Us    [corporate/about-us]
  Services    [corporate/services]
  Contact Us  [corporate/contact-us]


It is configured to appear only for pages with addresses matching the pattern corporate/*. So far so good. But in order to better communicate the Contact Us page, I created manually a duplicate of the Contact Us (with the same [corporate/contact-us] alias) at level 1 of the Main Menu. Once that duplicate is there, the block disappears from the Contact Us page.

Is there a Drupal culprit I bumped into? Is there a workaround for this?
Perhaps on the Contact Us page, the block is trying to display child menu entries for the new level 1 "Contact Us" item, and there are none? The block won't get rendered if there's no content.