Beam improperly missing while using Ctrl+Shift+Keyboard Arrow Up.

First insert these notes...
Then do Ctrl+Shift+up to the first bar and Ctrl+Shift+down to the second...
and you see this lol

Yes, the beam of the first bar just freakingly disappears and could not the be found from anywhere from heaven to hell.

Sometimes the beam could also be at the core of earth...

A very serious bug, wonder how come. By the way, check my second bar, and this bug only applies to lower staff+up and would not appear with upper staff+down.