Map data page disappears when recalculating route

When navigating with the Courses setting set to "Use Map" (instead of "Follow Course"), the map data page disappears whenever the route is recalculated. You then have to scroll back to the map page, and sometimes it isn't available at all—possibly while rerouting. This is frustrating, as the map vanishes unexpectedly during navigation.
Steps to reproduce:
  1. Select an activity (e.g., Run or Bike).
  2. In activity settings, go to Routing > Courses and choose "Use Map".
  3. Create or select a course.
  4. Start the activity and begin navigation.
  5. Scroll to the map data page.
  6. Go off course.
  7. Observe that the map page disappears.

I'm on software version 12.70.