Sound Only Comes Out of One Ear At A Time

When playing the game with headphones, sounds only come out of one ear at a time instead of being half and half between left and right ear. For example if a mob is to the right of me, I can only hear it from the right ear. Or if I'm mining a block and facing to the left, I can only hear the block being mined on the left ear. This can cause some jarring sound effects that don't sound natural at all during gameplay.