Audio effects not properly displayed in Mix tab

Steps to reproduce:
    1. Workspace > Audio

    2. Click on the Audio Layer Mix tab

    3. Click on a down arrow to add an audio effect

    4. Move over a first level effect category 

Result: The second level of audio effects is not properly displayed
Expected: The list of audio effects in the category correponding to the over mouse one
 
System info
    Application: Premiere Pro (Beta) v25.2.0.14
    OS: macOS v15.1.0, RAM: 64,00 Go GB, CPUs (logical): 16