See PHI624. Some of the mobile navigation and breadcrumbs in support pacts aren't as good as they could be.
In particular, we generally collapse crumbs on mobile to just the first and last crumbs. The first crumb is the application; the last is the current page.
On /PHIxxx pages, the first crumb isn't very useful since the Support landing page is two levels up: you usually want to go back to the pact, not all the way back to the Support landing page.
We also don't need the space since the last crumb (PHIxxx) is always small.
Allow Support and other similar applications to tailor the crumb behavior more narrowly if they end up in situations like this.