When starting audacity a small black square with rounded corners appears in the middle of the screen.
Using pipewire, pipewire-pulse.
Problem occurs after changing the default.clock.allowed-rates in pipewire.conf.
changed in pipewire.conf:
from : #default.clock.allowed-rates = [ 44100 ]
to : default.clock.allowed-rates = [ 32000 44100 48000 88200 96000 176400 192000 352800 ]
after reverting and restarting pipewire ; audacity ok