my X5 stays in red when in standby however it was staying blue like yours when it was connected via bluetooth.
my X5 SS had a little different issue where my P6 was keep waking my X5 SS up every other minute. no other buzz device created that interference. as soon I powered off P6 until my X5 SS never woke up on its own. so I would suggest try to turn off any other buzz device around your house or any other bluetooth device in your house and see if that helps.