Luden's Echo not working on Ez

I think ez Q doesn't count as a spell, it counts as a on hit modifier. and by think I mean i'm sure of it

here i shall confirm for you.

Q procs on hit effects which is why it procs shiv

Q procs on hit effects which is why it doesn't proc echo

all of his other abilities do not proc on hit and therefore it procs echo

Working as intended.

Clarity and burden of knowledge are important design concepts, you see.