If you own an iPhone, you might have recently experienced some weirdness going on with your sound while in social media apps. At least that is what several users are reporting on Reddit as of late.
The issue seems to be occurring while your iPhone’s mute switch is activated and the device is on mute. Now, usually, muting makes your phone completely silent. However, if you pressed either of the two volume keys, you would get the sound playing from the media back while still keeping notifications and ringtones completely off.