I don't have the English version of the manual right now (nor do I have the beta version 3.1) - in the Russian version, it says about the ability "Enemy Doesn't Resist" (Daughters of Earth after applying "Slow") - and in this case, "Readiness" doesn't work (at all!). So, with an average initiative of 10 (adjusting for "Storm" and artifacts), it's risky for combat griffons to press "Defend" - because when "Wait," as I mentioned above, "Readiness" also won't work. In general, all the signs of a bug are present.

Added 25 minutes later

2 antonag07
They definitely won't answer twice, that would be too much, and essentially, it can't be killed except with magic.

Whether it's "too much" or not, but essentially, this is also a bug (although I can agree that we are simply dealing with an incorrect description of how the "Readiness" ability works).