Adjusting Brightness slider affects Now Playing (Spotify)

Describe the bug
When adjusting the brightness slider, the Now Playing widget pauses and unpauses

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

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Device information:

  • Type of Mac: 2017 MacBook Pro
  • macOS version: 10.14.5
  • BetterTouchTool version: 3.04