We see an empty line (\n) at the top of QTextEdit and QLabel widgets when using markdown formatting

Please note: This has not been tested on a C++ environment, so it's possible that the bug is only for Pyside2 and PyQt5
Update: Has been seen in a plain C++ environment (see comment from chehrlic), as well as on Pyside2 and PyQt5. (First found on PyQt5)

Below is a minimal example (the result can be seen in the attached screenshot)

import sys
from Pyside2 import QtWidgets


class MyMainWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super().__init__()

        self.qte = QtWidgets.QTextEdit()
        self.qte.setReadOnly(True)
        self.qte.setMarkdown("Markdown text")
        self.setCentralWidget(self.qte)

        self.show()


app = QtWidgets.QApplication(sys.argv)
main_window = MyMainWindow()
main_window.show()
app.exec_()