Bluetooth doesn't stay connected after update 11.2
Go into Settings > Bluetooth > MY DEVICES and tap on the Information icon ('I' in a circle) to the right of the device, then tap Forget This Device. Tap again on Forget Device (in red) to remove the device. Re-pair the device and see if it stays connected as expected. This has worked for me with other Bluetooth devices (I don't own a tune2air) that have developed intermittent connections.