I want o second on that but report, sadly without much more information...
I am running
MacOs 10.14.3 (18D109)
BTT v2.716
and running on a MacBook Pro (15-inch, 2017)
The thing is, that all keyboard shortcuts works perfectly finde until a single point of time and then, they'll just stop working. Once I restart BTT everythin is finde a gain for 30 minutes or so, than the same happens again.
The only program that is affected bey this seem to be WebStorm by IntellyJ, but its also just the program I use most.
I also use a Programm called Keyboard Pilot which switches keyboard layouts, depending on what app is active. So for me that is a lot of switched, never tried if turning that of might help. but will do so next