Empty line (\n) at the top of QTextEdit and QLabel when using markdown

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_()