Hello. I have strange problem with arabic fonts in Kdenlive.

Please listen this video where i showing my problem: https://youtu.be/Vrb3ZXJxqsI (very sorry for my english )

This problem exists in many arabic fonts (maybe in all fonts). I confirmed it in me_quranR3HOQ, Amiri, Scheherazade and other fonts.

Can you help me with this problem? Maybe it is a bug in Kdenlive?