Release: 2019.05
Steps to reproduce:
Open a project with at least one MIDI track
Open the PRV
Activate "scrub" mode by pressing "J"
move the mouse cursor up to the Track View Timeline Ruler and click in the timeline
Observe:
"The audio engine has stopped unexpectedly" notification toast
The mouse cursor is now "boxed in" to a horizontal screen area that overlays the timeline ruler - you can't move the mouse outside this band to click on menu or c