The issue has already been documented and is with any blue tooth and they are working on it. And as far as those notifications, the bottom right icon or a bell with a strike through it means Silent so it is correct that activating it turns blue and all notifications off
I noticed that if I connect my Z10 BT using only the handfree mode with A2DP not connected (I pair my BT sametime with my old 9800 so it is connected handfree and A2DT). The notifications seem to stay on. That means I cannot play any music through my BT on my Z10. If I try connected my BT with the A2DP profile connected and play music audio through my BT, the notifications got turned off again at some points, Would someone be able to validate this?
If you go to setting > Bluetooth and select the bluetooth device that is paired, it will tell you what services are being used, mine shows: Handsfree Connected A2Dp Not connected Object Push Not Connected It seems the notification stays on for more than a week so far