Can't view/edit end of midi region

Several times lately I have had problems viewing/editing midi data at the end part of midi regions.
The scroll bar in the edit window doesn’t take me to the end of the region and if I the song is playing the playhead goes outside the viewable part of the edit window.

It doesn’t matter if I close the edit window and open it again.
I’ve simply had to restart Cubase and then it’s ok.

I can’t recall that this has happened previously, very strange.
Has anyone else experienced this?


Can you see the right border of the edit window in general?