Another reason why I think the official rule should be that anything normally inked that turn should stay face up until the “cleanup” stage at the end where it is turned face down. This would fix the issue of not remembering if you have inked and remove any confusion.
During the top8, Federico's opponente ink 2 times in streaming.
The judges give him just a "warning".
I don't know how it's possible this in a competitive tcg