Hello Blake,
Everything is up-to-date - bios and drivers.
I didn't mentioned, that the the laptop was in ASUS service center by the time it started losing battery capacity. If you look at 20-11-05 - this is the time when service center engineer started working on the laptop. On 20-11-06 I started the laptop for 1st time and I noticed the capacity drop. I suspect, that they discharged the battery somehow while the OS was powered off which led to this.
I have no idea what software they run and how this happened, I can only assume what happened.
At this moment the battery is not fully charging. The only good news is, that the capacity stopped decreasing at 71.679, but still, this is massive capacity loss in few charges.