"Smooth scrolling" for normal mice not working

Describe the bug
Hi, not sure if this is a bug or feature report but if I enable "Inverse scrolling for normal mice (...)" the "smooth scrolling" is broken. If I use the Macbook's Touchpad the "smooth scrolling" works fine but with the mice unfortunately it isn't.

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

Device information:

  • Type of Mac: MacBook Pro (13-inch, 2017)
  • macOS version: 10.15 Catalina
  • BetterTouchTool version: 3.206