"Show App Default Touch Bar" doesn't work for preview app

When I use the Preview app, the touch bar always shows the BetterTouchTool Touch Bar instead of the App Default Touch Bar. Even though the "Touch Bar Configuration for: (Preview)" is set on App Default Touch Bar and I clicked on save. It also appears as saved.

Strangely with all other apps the touch bar behaves how it should and how I set the configuration.

Thanks for your help.

5.1.20 Problem is solved. Don't know if some alpha version changed something, but it works now. Thx.

  • Type of Mac: MacBook Pro (13-inch, 2016, Four Thunderbolt 3 Ports)
  • macOS version: Catalina 10.15.1 (18C54)
  • BetterTouchTool version: 3.209