[REG] The color of QLineEdit and QPlainTextEdit placeholder text is not grayed-out if stylesheet was applied

If you set text color of a QLineEdit with stylesheet, for example:

ui->lineEdit->setPlaceHolderText("placeholder");

ui->lineEdit->setStyleSheet("QLineEdit {color:black}");

The placeholder text is not grayed out. Instead it is displayed black. This is a regression. It does not happen with Qt 5.15.2, but happens in Qt 5.15.3. Also tried Qt 5.15.4 preview version, it didn't fix it.

This is so disappointing  I bought a commercial license so that I can use Qt 5.15.3 to fix an annoying bug. Now I got an even more annoying bug... money well spent