Bluetooth headset control issues

Unfortunately, I am currently experiencing a strange issue with my Bluetooth headset controls.
When I turn on my BT headset (Philips SHB7150) it connects automatically to my device (Sony Xperia Z3 tablet with stock ROM & unrooted) BUT the RocketPlayer does not play when I press the single-button control on my headset as it does on other players (like Play Music).
When I press the play button in the app/widget, music is being played through the headset but I can't control from the headset.
Quite annoying since my tablet is in my laptop bag most of the time...

When I turn off the BT headset and turn on, pair again using NFC (manually pairing makes no difference, I also tried this) I'm able to control the music with from my headset. Until next time I turn it off, then I have to pair it again in order to work properly.

I triend manually deleting the pairing relationship between headset and tablet before pairing again and I also deleted all data & cache for 'bluetooth sharing' in the application manager. I read that pressing the volume up and power button on my device would wipe all cache, so I tried but still no luck :(

Any help would be greatly appreciated !!