BLE HID already sending

Hello,

I have hooked up a button to my puck.js and emulating HID keyboard clicks on the button press. It works fine for the most part, except once in a few times, it misses sending a key press over with the a 'BLE HID already sending' error.

error messageBLE HID already sending
error messageBLE HID already sending
Uncaught Error: BLE HID already sending
at line 1 col 55
NRF.sendHIDReport([0,0,0,0,0,0,0,0],function(){a&&a()})

                                                  ^

in function called from system

Looks like some of them get past the try-catch but others don't.

This happens even if I'm doing these button presses slowly, so it is not an issue of too many button presses going through in a short time frame. Does the port need to be flushed or something?

I tried upgrading to 2v02.6 cutting edge firmware, but the problem still exists.

The essence of my code can be found below.

var kb = require("ble_hid_keyboard");
NRF.setServices(undefined, { hid : kb.report });

var lastButtonState = 0;
var busy = 0;

function on_button_pressed() {

  var currentButtonState = digitalRead(D28);
  
  if ( currentButtonState === 0) {
    digitalWrite(LED1,0);
  }
  else if (currentButtonState === 1) {
    digitalWrite(LED1,1);
  }
  
  if(lastButtonState !== currentButtonState){

      digitalWrite(LED2, 1);
      lastButtonState = currentButtonState;
    
      try{
        
          if(!busy){
            busy = 1;
            if(lastButtonState === 0){
              kb.tap(kb.KEY.B, 0, function(){});
            }else if(lastButtonState === 1){
              kb.tap(kb.KEY.A, 0, function(){});
            }
            busy = 0;
          }
        
      }catch(err){
        console.log("error message " + err.message);
        busy = 0;
      }
    
  }else{
    
      digitalWrite(LED2, 0);
    
    
  }
}

setInterval(function() {
  on_button_pressed();
}, 5);