Why triple-turret guns do not automatically disrupt one another

Do the outer guns in a triple turret disrupt the centre gun?

Not inherently; adequate spacing and staggered firing can manage the interaction.

The outer guns in a triple turret do not inherently interfere with the centre gun. Designers can manage blast and interaction through barrel spacing and by staggering the firing sequence. The widespread use of triple turrets in new battleships by the Second World War shows that the arrangement was workable. This is a design variable to manage rather than a fatal flaw in the turret concept.