Repeat action for scrollwheel button

Describe the bug
I have setup the scrollwheel button to keyboard combination of "Command + N" to bring up a new system window. At bootup it works fine, but after some time it brings up 3 new windows instead of just 1.

Affected input device (e.g. MacBook Trackpad, Magic Mouse/Trackpad, Touch Bar, etc.):
Regular mouse connected via USB.

If applicable, add screenshots to help explain your problem. (You can just paste or drag them here)

Device information:

  • Type of Mac: MacBook Pro 16inch 2019
  • macOS version: Catalina 10.15.5
  • BetterTouchTool version: 3.387 (1610)

Additional information (e.g. StackTraces, related issues, screenshots, workarounds, etc.):
I have tried restarting BTT, but that doesn't work. I have tried quitting all applications and that doesn't work either. The only thing that seems to work is to reboot the system.