branching questions do not work in mobile app

thank you for the great plugi.

I try to contribute with a bug:

I tried to use branched questions in the mobile app.

I created a simple test

Pulldown A -> show label A

Pulldown B -> Show label B

 it works like expected on desktop,

it does not show the labels on mobile.

thank you for the great plugin Moodle V 3.9.9, Plugin
Guido Hornig