Ventura stage manager and window switcher problem

I have noticed that using a gesture to open the window switcher, in the list are always present one or more 'Gesture Blocking Overlay'
It seems that they are related to Ventura stage manager, since if I click the 'Float on top' icon, a rectangle appears over one of the stage manager groups on the left of the screen.
Could it be possible to avoid them appearing in the application list?