puck.js - keyboard "taps" not always accurate/responsive

So...this (despite causing an an error) "works" for my intended purposes. This is the only thing I've been able to do that makes it work "properly".

      NRF.sendHIDReport([kb.MODIFY.GUI,0,kb.KEY.F12,0,0,0,0,0], function() {
      });
      NRF.sendHIDReport([kb.MODIFY.GUI,0,kb.KEY.F12,0,0,0,0,0], function() {
        NRF.sendHIDReport([0,0,0,0,0,0,0,0], function() {
          console.log("keys sent");
        });
      });

Error:

Uncaught Error: BLE HID already sending
 at line 138 col 8
      });
       ^
in function "triggerCommand" called from line 96 col 88
...eld': held, 'light': light});
                              ^
in function called from system

Have any suggestions on how to improve this so it's not technically broken? lol