Leap Slam no longer gives any endurance charges when used with Endurance Charge on Melee Stun

As in topic.
Leap Slam no longer gives any endurance charges when used with Endurance Charge on Melee Stun despite reading "Damaging Hits always stun enemies that are on full life"

Used on my Corigzerk character before some patches ago. Stopped working for 0 apparent reason.

Bug report reference number
4 020 527 883

were you doing a map where enemies could not be stunned?

It doesn't even work on campaing content. I tested this in Torched Courts.

I triple checked every map I ran after I noticed this mod as I run a node in passive tree that gives me AoE on stun so it's better for me to run other ones.

I just figured it out... but I still don't get why it happens this way.

I have a cyclone linked with brutality and my endurance charge on melee stun was working fine.

I have leap slam linked with no brutality, and it wasn't working fine.

Turns out I have a little cold damage on my ring, which causes a freeze as I always crit cuz I use trypanon. This freeze overrides the stun I would cause with leap slam, thus I am not gaining charges...

But why? Why can't enemy be both stunned and frozen at once?

It also doesn't stun even if the cold damage is so low that you can't proc freeze.
Stun recovery is an action and freeze set your action speed to 0, so somewhere in the code they probably have "cancel all actions" flag, otherwise stun animation would occur after target unfreeze (just like the old days)

I did some testing with a character with 100% chance to hit. Here's what I tested and the results.

Leap slam doesn't stun with hits while using a 2h melee weapon (staff, sword, axe, mace).
Leap slam doesn't stun with hits while using a 1h non-club weapon (sceptre, sword, axe).
Leap slam doesn't stun with hits while dual wielding non-club weapons.
Leap slam does stun with hits while using a 1h club weapon.
Leap slam does stun with hits while dual wielding club + other supported by skill weapon (club + sword, club + sceptre, club + sword).

Edit:
Did even more testing and for dual wielding it looks like leap slam stuns only every second attack when equipped with club + other weapon. I assume that's when the club is the attack weapon.

I was also wondering why 2h maces don't stun. It might be because they increase stun duration, but, unlike 1h clubs, don't reduce enemy stun threshold. It would require additional testing with some unique 2h maces that do that, but I don't have them and it's not worth spending currency to buy them.

As you might've noticed. I had a 100% hit chance and 100% crit chance due to using Trypanon and having lots of accuracy. For me it was issue of a 7 to 14 cold damage in one of my steel rings: enemies got frozen and never got stunned until I removed that ring and dealt 100%, pure physical damage with leap slam. It might be the same case for you. Now it stuns 100% of time.