It is also mentioned here, including the “phone app trick”:
And there:
This bug is around since 2022 - that’s three years now. It still exists in 5.0.0.62. And it is not even mentioned in Jolla’s “known bugs” section…
I’m willing to help, if someone needs some logs or whatever, just let me know.
It is really annoying to have to call myself several times a day to get headphones working.
Update: It seems this is not a Pulseaudio issue: Pulseaudio shows that the audio gets played on the wired headphone, but the sound comes out of the ear speaker.