And knowing Nutaku, that's actually a pretty regular occurrence for them.
They do so many sneak updates/changes every patch/maint. that it drives me & my union mates bonkers sometimes. And their patch notes are always lacking in the details every single time.
As an example, we didn't find out the wind Lilim had been patched to have the 90%↑ of other lilims from its initial 70%↑ until only about a week ago. And apparently that had been changed for quite a while now. With not a single word in any patch notes ever.
**Edit**: And often times, the things they do end up mentioning in patch notes, like fixing the assist abilities for certain himes recently (since some of them weren't actually working/being taken into effect), is because a bunch of us sent in reports to them prior about that exact issue. So unless they get prompted about things in tickets prior for their patch notes to reflect, they never seem to divulge details on other unprompted changes they do make. Anyway, it's a pretty good reminder that things aren't always set in stone. Changes are constantly being made, so it's prudent to always keep testing things to see if they actually are the same or not. :>