is_app_running only seems to work on Apple apps

Describe the bug
I was using GoldenChaos and noticed that the Dock Badges where only working for Safari and Mail and other Apple apps, but not for Things, Agenda, Spotify etc. I looked at the AppleScript and when I removed the is_app_running part, then it does work.

DOES NOT WORK: "if is_app_running "Things" then"
WORKS: "if is_app_running "Mail" then"

Do you know what I may have done to create this issue?

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

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

Device information:

  • Type of Mac: 2020 MBP M1
  • macOS version: 11.1
  • BetterTouchTool version: (please post the exact version - not just "the latest one")
    Additional information (e.g. StackTraces, related issues, screenshots, workarounds, etc.):