Resizing the Subtitle track makes it disappear

Steps to reproduce:

1.Alt-middle-mouse-scroll-wheel in the Subtitle track to resize it, like I can with Video and Audio tracks.
 
Result:

It enlarges, but disppears off the top of the timeline panel and it's impossible to drag the divider (like I can with the divider between the video and audio tracks)

Expected:

Subtitle track should enlarge downwards, into the Video Track space.
 
System info
    Application: Premiere Pro (Beta) v23.5.0.24
    OS: Windows v10.0.19045, RAM: 127.91 GB GB, CPUs (logical): 32