setDragEnabled() is breaking interactive item selection in QTreeView

if setDragEnabled() is set to True, multiple selection of QTreeview items does not behaves as intended.
with attached example, hold ctr button and select any two item.
then click on any selected item to unselect while holding ctr.
Expectation is that it will unselect but reality is it will make it editable.

Now redo it again, select first two item while holding ctr key, Then without holding ctr key select third unselected item, expectation is all other selected items will be unselected and and third item will be selected but reality is this also gets selected and edited.

if comment setDragEnabled() this seems working better.

This works great with Qt5.15.x