Emojis and Chinese Characters are Painted Incorrectly when Scaling Factor is Non-Integer

When writing a QtQuick application, the emojis and Chinese characters in Label or Text components are not painted in their corresponding place if an non-integer scaling factor(1.25, 1.5, 1.75, etc) is applied. If a scaling factor of 2 is applied, they are painted correctly.

This can be reliably reproduced in Windows 10 1803/1809, MSVC 2017. Only emoji dislocation can be observed in GNU/Linux operating systems, regardless of displaying system.

I suspect Qt's non-Latin glyph rendering does not handle non integer scaling factors correctly.

The example code is in the attachment, notice that the text should be displayed within the rectangle.