QCalendarWidget issue when having a custom CSS stylesheet

[ivelin.krastev]

Hello. I am currently trying to solve the following issue:
Case 1: Create a Qt GUI Application and add a QDateEdit with a calendar popup to the main window.
Result: Everything looks fine.

Case 2: To the same application set a stylesheet via QApplication::setStyleSheet.
Result: The calendar popup looks a bit weird.

Note: The stylesheet CSS file contains only a background-color style.

Can anyone help me with solving this issue?

Thank you.