Medium Aura of the Beholder heals the DK unexpectedly

Description of the bug: (optional screenshot/video): The 2022 Anniversary–Summer patch notes say this:

However, the Aura of the Beholder (at least, at the maximum level of the skill; I haven’t tested it at other levels) heals the DK to above their new “zerk threshold” of 50% HP. I started noticing this right away after the patch, because I’m accustomed to using AotB during the 3rd body of Bergamot, and I noticed that (with 30k MAXHP) I was mysteriously ending up at, say, 15250 HP, despite starting at well below 15k HP and not being healed nor damaged — other than by AotB. However, as it turns out, this bug is very easy to reproduce, so I have a video showing two reproductions:

https://www.youtube.com/watch?v=s_b-Colb6BM

As you can see in the video, AotB seems to think that 50% of 30000 is 15300 (or something quite close to 15.3k), but as far as I know, that’s not true.
What is supposed to happen?: AotB’s healing should never result in the dark knight’s HP being 15000 or higher, assuming that the DK has 30k MAXHP.
Where did you find and/or notice this bug?: Mostly Bergamot, but it can be reproduced anywhere.
A step-by-step guide to re-producing this bug (optional): If you have a DK with maxed AotB and 30k MAXHP, you can just get your MAXHP to ~14.7k or so, and watch as your monocular friend betrays you.
Extra information (optional): I do not know whether or not this bug is related to another dark knight bug that I reported which also came as part of the 2022 Anni–Summer patch.

Even with the old version of Berserk, this would still be a bug, because AotB refuses to heal me to beyond 15.3k or so. In the old version of Berserk, I would expect to get healed to as much as 16499 HP, and indeed the old version of Berserk/AotB worked flawlessly (I used to use it all the time).

Also note that, in the video, you can see a minor visual bug that is presumably related to Achilles: the purple numbers show me taking “9” damage every time from the brambles, but my HP gets lowered by 10, not by 9. This is a pretty minor bug, though, but maybe worth mentioning.

 

19917 base MAXHP, 20795 equips-and-unbuffed MAXHP