Yes, I forgot to mention the undock, so I:
1. Run MM
2. Cleared NP (via NP menu -> Edit -> Clear)
3. Un-docked NP
4. Right-clicked a track in the main panel
5. Find more from same is properly filled up
Looking the screenshots I do exactly the same steps as you, but I am not able to reproduce in 1228
No problem to reproduce in 1227.
I will ask another developer to reproduce this in build 1228.