No, a patrol line should not cross any no-go zone.
The patrol speed will follow the universal "moving speed" setting in the "Work Preferences" page. Adjust the moving speed there to change the patrol speed.
Yarbo will calculate the shortest recharging route using an automatic algorithm and will follow the patrol line you’ve drawn to return to the docking station.
Yarbo will first navigate to your work area via the pathway, patrol the perimeter, and then proceed to patrol the designated patrol line.