Bug report

Bug summary

Run examples/widgets/rectangle_selector.py. Draw a rectangle. Draw another rectangle: the first one is cleared out. Toggle the selector inactive with "Q". Toggle it back to active with "A". Draw yet another rectangle: the second rectangle doesn't get cleared out.

Expected outcome

Older rectangles get cleared out regardless of whether the widget was momentarily toggled inactive previously.

Matplotlib version

• Operating system: archlinux
• Matplotlib version: master
• Matplotlib backend (print(matplotlib.get_backend())): any
• Python version: 38
• Jupyter version (if applicable):
• Other libraries: