Zooming Out of Transition Timeline causes visual bug

In FMOD Studio 2.1.07 and 2.1.09 when I edit a transition timeline and zoom out of it, a black glitch occurs and I’m forced to restart FMOD studio to do further editing.

I’m afraid I haven’t been able to reproduce this bug yet.

Do the affected transition timelines use destination markers, destination regions, or both? Transition markers, transition regions, or both? In events affected by this issue, what are the timeline positions (and lengths) of the destination and transition regions/markers involved? What is the timeline position of the instrument or marker that’s last on the timeline?

Also, what operating system are you using when the issue occurs?