Hi,
We used the word Feuerlöscher in the following quiz.
German Umlauts Test
It is working properly. QSM is able to detect the selected answer and you can see the points scored.
https://drive.google.com/open?id=1ycQ85pz6HPi9m2LLVdRftt-mbkmhA9Qr
This is my setup.
https://drive.google.com/open?id=1Pug7QAJDj3msr2iaNs3QrTXos4-DuCSm
Please confirm that you are using current version of QSM.
Please also clear any cache plugin or server cache’s cache content, as well as browser history.
If the issue persists, please show a screen-shot of your question setup and I will try to replicate the issue.
Regards,
Kriti