Each time I unlock my macbook pro 15" 2018, my touch bar displays a `x` button and the `esc` button, whatever my mac is running (it is not displaying the address toolbar on chrome for example). I must always touch the `x` button to remove it, and display the current content for the touch bar.

I checked for running applications with system monitor, and nothing was wrong.

Is there a way to know what is currently controlling the touch bar? I want to delete this, and I cannot find it.