QPushButton look and feel discrepancy between western languages and oriental languages on macOS

I think this issue has been there since day one. I'm a little baffled why it is still there.

Basically, on macOS (any recent versions), a QPushButton with western text appears normal with native look and feel. But if you apply a oriental text such as Chinese, Japanese or Korean, etc., the button will "bulk up" a little bit and lose the native look and feel. It looks ugly and unprofessional. Please take a look at the screenshot. Why does this happen?