One thing I noticed today was that settings for the headset are only updated when the headset is removed and then reinserted.

Example:-

I normally have "prevent playback interruptions" as "always" and "Headset button" as "Do Nothing".
Upon inserting my new WH-205 I pressed the button forgetting I had this disabled, due to the libplayback issue.
I changed the settings to "Never" and "Skip track" respectively, the button didn't work, until I removed and re-inserted the headset.

Is this the expected outcome?