Midi Out active in stop mode.

I see down below in right corner that the midi out indicator is constantly pulsing a bar even with deactivated feature “send midi sync in stop mode”. I don’t play, do anything, but it sends something. I don’t like this kind of uncontrolled events)
What is it doing and how to stop it?

This happens to me as well. And I was watching some tutorial and I noticed it happened there as well.

Would like to know what it’s doing to be honest.