Glitching into Shulkers

If i /kill near a Shulker with Invisibility and Glowing effect with No AI I will glitch into the shulker.The issue can be resolved by reloading the world or unloading the chunk where the Shulker is and loading it back but it's very annoying because in my map everythings is timed and reloading the world adds more time.... Unfortunately I can't make any screenshots of this...