Hi,
To the best of my knowledge, there is no solution or workaround at this stage.
We have to wait and hope for an update to Android 4.4 Kitkat. There are currently open community efforts (by Chris Hoffmann) that test this and demonstrate new BT capabilities, so this would perhaps fix the issue. But this is currently not even at the beta stage, no way to use this in daily use.
We have to hope for an official Fairphone update, which is still uncertain, essentially because Fairphone was screwed by the chipset manufacturer (Mediatek) over licensing agreements, on top of upgrades being already complicated because all subsystems have to be tested.
I see that the issue does not feature in the “known bugs” list, despite having been reported as a bug. I will send FP tech a message about that.
Best,
Jan