QPushButton with stylesheet cannot be pushed when it is clicked on macOS & Qt 5.15

QPushButton with stylesheet neither can be pushed nor its clicked event is fired when it is clicked on macOS & Qt 5.15. This bug doesn't appear on Windows and Linux versions of Qt 5.15. Previous than 5.15 versions of Qt also don't have this bug.

To reproduce this bug:

• Create a new Qt Widgets Application Project on macOS version of Qt 5.15
• Add a push button to the main window
• Add qDebug()<<"pushed"; statement to its clicked() slot
• Add any stylesheet for QPushButton like below:
  QPushButton { background-color: yellow }
  or
  QPushButton {border: 2px solid}
• Run the application.