Potential Bug between Titan's Crushing Impacts and Impact Shockwave Support Gem

I may be wrong here but based on reading the passive, Crushing Impacts and the gem, Impact Shockwave, all hits can now trigger heavy stun and when the supported skill of the gem heavy stuns an aftershock should be created.

My assumption was this allowed this gem to be used on Mace Strike and get Aftershocks. But that doesn't seem to be the case.

Any one tried it with other Strikes and gotten it to work? I know this is more to enable Heavy Stun builds but I was curious why this isn't working and if it's not a bug then what am I missing?

Same here. I also can't seem to get Impact Shockwave to work at all.

This is something I wonder aswell. Seems not to be working.

I tested it again and it does seem to work now. The aftershocks are quite hard to see and I don't know if they fixed it or I simply missed it but it works for me.

I ran into this issue as well