Impact Shockwave not working

The support gem 'impact shockwave' does not work on 'staggering palm' of the monk when u heavy stun someone : nothing happens...

Is that normal ?

Can also confirm.

I've tested with Quarterstaff Basic+Impact and Staggering Palm+Impact.

Staggering Palm auto-Heavy Stun effect buff is triggered but the Staggering Palm itself won't trigger. You can see the visual trigger with Quarterstaff Basic Attack+Impact.

EDIT: just clarifications.

UPDATE: I did some testing and I think it has to do with the buff component. Adding Scattershot Support causes the buff from Staggering Palm's Auto Stun to launch 3 projectiles at the same time.

If you support Staggering Palm with Combo Finisher, you will only fire 1 set of projectiles as you technically would need 5 more combo points to trigger another.

I'm assuming that Impact Support is working on the Projectiles launched from the auto-Stun Buff. It's incredibly difficult to set up a test.

yeah impact shockwave isn't working properly in some regard

its easy to test as a titan with crushing impacts as an ascendancy, cause you'll heavy stun everything in one hit, basically. no aftershock is created with any skill i can link it to, including "mace attack" the default attack

Also doesn't work with the Warrior's two handed mace attack. Nothing happens on heavy stun. It says there should be an aftershock. :(

still doesn't work

Still not working.