Sometimes, fonts will be displayed unreadable or with weird characters. It’s not directly reproducable and doesn’t happen always at the same place
The iOS Application currently uses Qt 5.9.3, and this is a Bug in the QT-Framework, specifically QTBUG-63476.
We will upgrade to QT 5.9.4 in a future release.
The problem was first reported by @Pordoi in this thread.