Play/pause not working (10.13.6, 3.626-1778)

System information
MacBook Pro (13-inch, 2017, four thunderbolt ports)
macOS High Sierra 10.13.16
BetterTouchTool 3.626 (1778) - just downloaded from website
Clean install of BetterTouchTool - removed preference plist and application support folder.

Describe the bug
When assigning "play/pause" action to any hotkeys, pressing the hotkey does not work. Other actions (I did not test all of them) work. Note that "previous" and "next" also does not work. Using the "play/pause" feature in Pock (which I guess uses similar macOS functions/APIs/whatever you call them) works.

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


Additional information (e.g. StackTraces, related issues, screenshots, workarounds, etc.):