Panning problem with Direct Routing

Cubase
,
1
  1. Create two mono audio tracks.
  2. Switch on Direct Summing Mode and show Direct Routing in mixer.
  3. In Direct Routing, route both mono audio tracks to a stereo Group track.
  4. Use drop-down in Direct Routing to remove main Stereo Output from source audio track routing list.
  5. Pan control disappears from source mono audio tracks, even though they are still routed to a stereo Group.