mute console with USB Serial connection

Hello!
Need to kill any console messages that appear after Serial is open with a terminal app. I reconnect Pico before opening Serial with PuTTY evry time. Used Troubleshooting code, but it works halfway. I need to get "B01" and "B02" messages only, but some errors happened.

function onInit() {
  setTimeout(function() { Serial1.setConsole(); }, 1000);
  digitalWrite(LED2, 0);
}

var on = true;

function echoOut(indelay) {
  if (indelay < 1){
    USB.print("B01\r\n");
  } else if (indelay > 1 && indelay < 3) {
    USB.print("B02\r\n");
  } else if (indelay > 3) {
    digitalWrite(LED2, 1); // it's ON after power on, so need to put OFF in init
    USB.setConsole();
    USB.print("move to USB\r\n"); //this stops LED blink if USB Serial is not connected
    console.log("console is moved");
  }}

setInterval(function () {
  on = !on;
  LED1.write(on); // Just to check Pico is alive
}, 500);

setWatch(function (e) {echoOut(e.time-e.lastTime);},
  BTN1, { repeat:true,
  edge:'falling'
});

short: B01

longer: B02

longest:

<- Serial1
Uncaught InternalError: setDeviceClockCmd: Unknown Device 752
 at line 31 col 20
    USB.setConsole();
                   ^
in function "echoOut" called from line 1 col 26
echoOut(e.time-e.lastTime);
                             ^
in function called from system

Same errors "Unknown Device" I got with and LoopbackA too. Second longest press in same session makes no error, just output "move to USB" and second message.
So, I got a clean output, and move back to USB is working. But I want to point all that errors.

Thanks - I just tried this, and it seems to be a bug in the firmware.

It seems you can work around it by changing USB.setConsole(); to try { USB.setConsole(); } catch(e) {}. However I have just fixed it so it'll be in the 'cutting edge' builds, or 1v97