In multiplayer, sounds from other players can be heard as if they were nearby, even if they are so far out of range that their nametag is no longer visible. This bug is found, to my knowledge, on Apple iPhone 4S and iPhone 6 devices, and can be reproduced by simply starting a LAN world, having another player join and walk out of range, and then have said player break a block.
NOTE: Screenshot not provided due to the fact that this is a sound bug
Related to MCPE-8791