New config UI shows [fn] modifier icon when it isn't being used

Certain keystrokes cause the [fn] icon to be shown in the Trigger, even though it is not being used. See the screenshot below, where the keystroke control-option-command-end is being used.

Device information:

  • Type of Mac: 10.14.5
  • macOS version: iMac (Retina 5K, 27-inch, 2017)
  • BetterTouchTool version: 3.04