[Glyphs 3] Crashing App in Font Table View

Behavior: App crashes by becoming unresponsive

Reproduce by: Go to Font tab -> tabular view, click into either Left Group or Right Group, and hit Shift + Tab (to go to previous field, in theory). Crashes the app every time.

MacOS Catalina 10.15.7 (19H15), Glyphs 3.0.3 (3066)

I have reproduced it. Will investigate.