Nested groups not opening

Describe the bug
Create a touchbar group within a group. Can't open it to edit it: double-clicking will bring you to widget type selection, and using the menu item OPEN GROUP will show a sliding animation but won't work.

Affected input device (e.g. MacBook Trackpad, Magic Mouse/Trackpad, Touch Bar, etc.):
Touch Bar

Screenshots
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Device information:

  • Type of Mac: MacBook Pro 16"
  • macOS version: 10.15.5
  • BetterTouchTool version: 3.389

Additional information (e.g. StackTraces, related issues, screenshots, workarounds, etc.):