Maybe memory leak in QTreeWidget when removing an item

Trying to remove an item from a QTreeWidget, either using QTreeWidget.getInvisibleRoot().removeItem(top_item) or QTreeWidget.takeTopLevelItem(index) seems to hold the memory. (Note: This issue is not there in a custom build of Qt/PySide 6.3.2)

However using QTreeWidget.clear() properly releases the memory. Please keep in mind that I would like to keep other top items.

For now I use a workaround to release the memory: During the removal, I take the top item from my main tree, spawn a dummy tree, attach the top item I want to free to the dummy tree then use the clear() method of this dummy tree. This way the memory hold by the top item is freed somehow.

I attached a demo script. Running the test creates a 1st top item that I want to keep, then will iterate several times to create and immediately remove a second top item. Those top items are always populated with 3 levels of children so that the memory footprint appears. The memory is never released.

A checkbox is provided to activate or not the workaround.

I also put some pympler prints to show the memory consumption before/after the run.