change event isn't fired to screenreader when item or checkbox is disabled

I am blind, so work with a screenreader. As a PyQT developer, I'm facing this issue: When creating a list with items that can be toggled on or off, the change event is fired to the screenreader when toggled from off to on, but not when turned off again. Tested with Jaws, NVDA and narrator on Windows. Same happens, when items are changed to checkboxes. The new status is of course announced to the screenreader when e.g. moving to another item in the list and then going back, however it would be helpful if the property change was fired directly after it occurs. Attached is a Python file with a list to reproduce this behavior.