MIDI Editor is docked at the bottom and attached to the main window.
When opening the editor, the display is shifted at first, but corrects itself after resizing the docker.
I am not sure if I am overlooking something, but the MIDI editor seems fine to me.
It seems as if the MIDI editor's timebase is set to "Project synced", so when you move the MIDI editor, it will adjust the piano roll to line up with the arrange view.
The MIDI editor is not at the correct position in the dock. It's shifted down and right so that a portion of it is not visible - not usable. All the lower drop-down fields etc.
Only after resizing the dock, the editor snaps to its correct place.
This happens every time I open the editor, extremely frustrating.