TableView delegate item painted above TableView widget

Hello !

Starting at version 5.14.2, a QStyledItemDelegate is painted above my TableView widget render.

Here is the problem on row 1, with version PySide2 5.15.2 (row 1, col 1)

And here is the result with Pyside2 5.14.1

I've made a quick snippet code to show you the issue, and attached it to the issue

Regards

Alexandre