FWIW I am finding the same thing here.
Ft-710
Pi5
Ubuntu 24.04 stock pipewire but using x11 not wayland
Wsjtx 2.7.0-rc3 set to pipewire
Pressing tune or enable tx would not produce any audio drive on the 710
I then installed pavucontrol.
When trying to tx audio output in pavucontrol would cycle bet
I could copy all 4 stations fairly well. I was able to get a signal
report from the fox on all bands, but only completed the contact on 40
meters. On the other bands I got stuck sending my signal report. It
appeared as though the fox was initiating new QSO's and not finishing
previous contac
