@Davey To be clear- Dragging a midi file will retain sample rate. Opening a midi file is where it will change.
I beg to differ. If I drag a .MID file onto the home screen without any song open it opens at 44.1k for me, despite everything being set to a default of 48k. But you are correct that I've never noticed before! And I'd still call it a bug, but definitely not a major one.