QTabWidget moving tab bug using stylesheet

[Alundra]

Hi,
I'm using a QTabWidget and I have the stylesheet loaded and set using "App.setStyleSheet".
When I move the tab on a movable QTabWidget, the text and border is not visible anymore, this is like a rectangle of color, only the close button is visible.
That only happen if I set the background-color in QWidget of the stylesheet like that :

QWidget
{
  background-color: #302F2F;
}

QWidget
{
  background-color: #302F2F;
}

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If I don't set the background-color the moving tab looks the same as before moving.
Is it a bug of Qt or something I miss ?
Thanks for the help

[Alundra]

Minimal code to reproduce the bug (move tab1 or tab2 and you will see the tab becomes gray) :

#include <QApplication>
#include <QMainWindow>
#include <QTabWidget>
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    a.setStyleSheet("QWidget{background-color: #302F2F;}");
    QMainWindow MainWindow;
    QTabWidget* TabWidget = new QTabWidget(&MainWindow);
    TabWidget->addTab(new QWidget(TabWidget),"Tab1");
    TabWidget->addTab(new QWidget(TabWidget),"Tab2");
    MainWindow.setCentralWidget(TabWidget);
    TabWidget->setMovable(true);
    MainWindow.show();
    return a.exec();
}

#include <QApplication>
#include <QMainWindow>
#include <QTabWidget>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    a.setStyleSheet("QWidget{background-color: #302F2F;}");
    QMainWindow MainWindow;
    QTabWidget* TabWidget = new QTabWidget(&MainWindow);
    TabWidget->addTab(new QWidget(TabWidget),"Tab1");
    TabWidget->addTab(new QWidget(TabWidget),"Tab2");
    MainWindow.setCentralWidget(TabWidget);
    TabWidget->setMovable(true);
    MainWindow.show();
    return a.exec();
}

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Link of the QTBUG : https://bugreports.qt.io/browse/QTBUG-45173