Description of problem:
No sound is output on startup, neither through laptop speakers nor headphones. After plugging in headphones and unplugging them, sound is output through speakers. Headphones stay silent no matter what I do.

Version-Release number of selected component (if applicable):
pipewire-0.3.68-1.fc38.x86_64
kernel-6.2.10-300.fc38.x86_64

How reproducible:
Reproducible

Steps to Reproduce:
1. Boot the system and log in
2. Do something that would normally output sound, e.g. run a music player
3. Plug in headphones
4. Unplug headphones

Actual results:
No sound through speakers after step 2, no sound in headphones after step 3. After unplugging the headphones, speakers output sound again. 

Expected results:
Sound is output through speakers or headphones, depending on if the latter are connected.

Additional info:
I looked through upstream issues and the (gut feeling) closest match seems to be https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/3148 even though the symptoms described there are kind of the opposite of what I experience: sound through speakers when headphones are connected.

I played around with alsamixer and found that unmuting my headphone brings sound back there, but the GNOME/Pipewire controls still modify the speaker and master channels (only when the latter is affected does the volume in the headphones change).