Scrollbars obstructing widgets in ScrolledPanel

The ScrolledPanel demo shows a scrolled panel with both horizontal and vertical scrollbar. When the cursor moves inside the panel, the scrollbars are drawn on top of the panel’s widgets:

If a widget happens to be entirely covered by a scrollbar, it becomes inaccessible by mouse.

Is it possible to reduce the size used for drawing by the width/height of the scrollbar, ie. reserving the space for the scrollbars? Would it help to make the scrollbars permanently visible (and how would I do that)?

My system:
Linux Mint 21.2 Cinnamon
Python 3.10.12
wxPython 4.2.0