QScrollbar bottom problem

Hi all,
QScrollbar has one big issue :
http://uppix.com/f-Scrollbar5390c4520016a883.png
Look at the bottom of the scrollbar, you will understand.
The bottom is on the border of the widget.
I tried a lot of way to kill it, no one works.

Explicit scrollbar? Scrollbar of a widget? Tried a different widget style?

Cheers,
_

Without "App.setStyleSheet( StyleSheet );" I don't see the problem, you right.
What is weird is I commented all the "QScrollbar" and "QAbstractScrollArea", the problem is there.
I will add in a new stylesheet part by part and stop when the problem is there, surely the best here because my stylesheet = 932 lines.

All works fine until I have :

Quote:

---

QAbstractItemView
{
alternate-background-color: #3A3939;
color: silver;
border: 1px solid #3A3939;
border-radius: 3px;
padding: 1px;
}

---

The problem is the same with only :

Quote:

---

QAbstractItemView
{
border: 1px solid #3A3939;
}

---

Hope you know a solution for that.

EDIT:
Apparently on the global stylesheet remove it is not enough.
Here a screen who shows better the problem :
http://uppix.com/f-Scrollbar53912e4f0016a965.png

Here a minimal code that reproduces the bug of Qt :

Code:

---

#include <QtWidgets//QApplication>
#include <QtWidgets/QPlainTextEdit>
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QPlainTextEdit e;
    e.insertPlainText("a\na\na\a\na\na\na\na\na\na\na\na\na\na\na\na\na\n");
    e.setStyleSheet("QPlainTextEdit{ border: 1px solid black; }");
    e.show();
    return a.exec();
}

---