At my FP3 the jack is working even with headset functionality 
But after plugging in it’s like a timer is running until some issues occure 
(can be 10 min, can be many hours)
Issues that have occured at some point:
Audio crashes (including internal speaker): no sound or unbearable crackle
Audio crashes partly: no media, no type sounds, but ringtone works
Headset: volume up / down doesn’t work anymore
For example: I plug in the headset at night and listening some music. At the morning the volume buttons don’t work (or audio crashed completely).
All issues can be fixed temporarily with reboot.
I want to report to fairphone,
did anybody else experience this behaviour?
Might be related to the audio issue mentioned by Fairphone CEO.