Dorico iPad Default Font Family selection problem

Hi! I’m having a problem trying to change the default font family in General Preferences. Tapping the drop-down brings up a long list of fonts sorted alphabetically. The problem is that there is no way to scroll through this list. There is an arrow icon at the bottom but it’s completely unresponsive. I have tried various gestures and even scrolling with the scroll wheel of a Bluetooth mouse but nothing has worked so far.

This behavior is reproducible in Dorico 5.1.80 on iPadOS 18.2.1.