Describe the bug

The "Instrument" drop down is harder to use than it needs to be.

To Reproduce

Run Jamulus Client with the GUI.

Open the Settings, My Profile tab and click the "Instrument" drop down.

Expected behavior

The list of instruments should drop down from the control, with the selected entry still under the cursor. (This is how the beta1 release - from the installer - works on Windows for me.)

Actual behavior

The list fills the screen from top to bottom. Finding the curent entry is difficult as it's not necessarily anywhere near the pointer.

Screenshots

Click the selected item...

Some other entry is no under the pointer.

Operating system

Linux

Version of Jamulus

3.9.0beta1 (and various other versions)
Qt 5.12.8 which could be the cause. The Windows version ships with Qt 5.15.2, whilst the Linux version uses dynamic libraries already installed on the system.