Summary: Tech Junkie Vol.6 seems to not be working.
Game Version: A21 b324
CPU Model: AMD Ryzen 5 5600X
System Memory: 32 GB
GPU Model and VRAM: nVidia GTX 4090 24GB
Screen Resolution: 1920x1080
Video Settings: Ultra
Game mode: SP
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?: On
Tech Junkie Vol.6 is described as "Charged Strike: This technique gives a 25% chance for regular and 50% chance for power attacks to instantly charge stun batons." but I don't feel its effect even after acquiring it.
Additionally, from what I can see in the progression.xml and item.xml, there doesn't seem to be any notation related to this book's perk.
Detailed steps to reproduce the bug:
1) Get and read a Tech Junkie Vol.6
2) Attack any zombies
The charge is only made as usual.
Instantly charge is probable as described.
Link to Pastebin Output Log: https://pastebin.com/qJPSWcKn