Takedown damage in coop is bug ?

[woven hare]

Hello,
I make a post for this bug:

Solo takedown work perfectly
Lvl 4 player versus lvl 2 zombie
The 2 other player is lvl 2 in each context
In coop :
-One game where i can kill zombie with in a single takedown with a friend
-One game where i can't kill zombie with a single takedown with my other friend, the zombie go at 25% health with a takedown so it alert the other zombie
In each case,when i can kill with a takedown my friend can too but if he can't , i can't

I did test with quick match and the case with "can't kill with a single takedown" happen

I don't know if difficulty change something but the case where i can kill in à single takedown is in hard.The other case happen in easy and normal
Haven't find any game in my lvl in hard so can't try without spoiler

If you need extra informations don't hesitate to ping me in this post if you have an answer

Best regards to all of you who see my post

[woven hare]

So more information , i did join other game and the case where i can kill with takedown seem ... strange.
I can sell for 1 gold and i can't see everything.He create his game in hard difficulty and my game was created on Normal difficulty.
Very strange.

[woven hare]

Issue has been send to the DL2 Support
Was asked about it on another discussion