Why do I get a spitty, almost airy sound when I tongue ?

My set -up is a Yanagisawa AWO2 unlacquered alto , Johannes Gerber NY Bros #6 HR mpc , Marc Jean 1st edition ligature and Alexander Superial #2 reeds . My issue is when I tongue notes , they always sound spitty . I've tried different brands of reeds , all within the same 2/2.5 range and it's always the same . When I practice my scales legato , I have zero issues . When I try working on my staccato , I get a spitty , almost airy sound . Can anyone suggest a cure/fix ?