Assalamu alaikum warahmatullahi wabarakatuh.
In the Madani muss-haf in real life, there are two types of tanween for each of the fat-ha, kasra and dumma, which denote the type of madd on that letter. I have attached screenshots of the dumma example in 2:18. The app is missing Type2 (e.g. In 2:18, "omyun").
The error is throughout the app for the Uthmani/Madani KFGQPC Hafs font in the Mushaf Unicode Text type (I have not checked all other fonts or types).
Jazakum Allahu khair.