[Queued Tracking] Can't stop

Hi all,
I’m testing the Queued Tracking plugin using Mysql as backend.
Now I want to disable the Queued Tracking via Matomo UI but seems it is not stopping. Even though the monitor displays “QUEUE IS DISSABLE”, the queues keeps growing.

I have a multi server environment with 3 Tracking servers (windows 2016), 1 DB (windows 2016 and Mysql8) and 1 UI server (Windows 2016). All config.ini.php and \JS folder sync.
Running Matomo 4.2.1

How can I be sure it is really disabled?
Is there any way to disable the Queued Tracking via command line?

Thank you