Yes, that's another of the things that this caregiver, Marcellina, lost when her case became a humanitarian case instead of a live-in caregiver case. If there is concurrent processing of overseas dependants, the children overseas are locked in at the age that they have. If they're 10 years old when their application starts, they will forever be considered dependants, even if 10 years go by and suddenly they're 20 years old. As long as they were the age of dependants when they started, they will be locked in at that age.
Having the same lock-in date possibility for the overseas dependants of H and C applicants would definitely go a long way towards curing what happened to Marcellina in this case.