Urban Combat vol. 6. bug or not sp/mp? (different trigger activation) a20, a21

Game Version: A20(maybe earlier), A21-b324

OS/Version: Windows 7, Windows 11 home single language (last update).

CPU Model: Intel i7 2700K, AMD Ryzen 5 4600H

System Memory: 16GB, 32GB

GPU Model and VRAM: (nVidia GTX Titan 6 GB, "Graphics Model AMD Radeon™ Graphics"(integrated graphics AMD Ryzen 5 4600H) RAM GB

Screen Resolution: 1920x1080

Video Settings: any

Game mode: SP RWG(rather, the type of map does not matter), MP(steamcmd dedicated server) RWG(rather, the type of map does not matter)

Did you wipe old saves? Yes

Did you start a new game? Yes

Did you validate your files? Yes

Are you using any mods? No

EAC on or off? try both

Status: i think NEW

Bug Description:
I'm not sure if this is a bug, but bookperk Urban Combat 6 has been working differently for several years. With a single game, it is triggered when hitting a zombie and when hitting zombie a player, in a multiplayer when hitting zombie a player only. Earlier in version a18 or so, it works the same way, in combat, it doesn't matter if the player hit a zombie or vice versa, it always worked, but for several years now on a dedicated server, it doesn't work like in a single game, is that how it was conceived or is it a mistake? the problem concerns both version a20 exactly and version a21 exactly, maybe it appeared earlier.

Detailed steps to reproduce the bug:
This thing is very easy to check, run a single-player game, study the sixth book "Urban Combat No. 6", hit zombies and check whether the buff hung on the "B" button. Then you do the same thing in a network game, raise steam cmd dedicated server, study the book, and when you hit a zombie, the buff does not appear, and when a zombie hits you, it appears.

Actual result: (description of what is occurring)
The trigger "Armor Adrenaline Rush" is triggered in different ways, in multiplayer only from each zombie hit on the player. In a single-player game, and from player's each hit to a zombie, and from each zombie's hit to a player.

Expected result:
I do not know how this perk should work, since there is no detailed description of how it should work. But it seems that it should work same in a multiplayer and single-player game the same way, it used to be.

p.s.:
I do not know if it makes sense to throw some logs or additional information here, because I am sure that the problem is easy to replay by what I indicated above. But please let me know here if the mechanics of this perk were conceived this way specifically in a single and multiplayer game in different ways, so that I would understand that it is not worth expecting a fix.

Thank

English not my native language.