Nothing 2 user, I have noticed ,(along with other different phone users) the incoming notification from the likes of FB come in very loud compared to anything , almost like overriding the settings volume on the phone , Really starting to piss me off when it goes off at 2-3 in the morning while sleeping, Picking it’s a Android thing , What can be done , I can’t find anything in settings to either turn them off or lower the volume to match what is set on the phone (Preferred) Seems to be Iphone and Android users finding this, but no real answers from powers that be.