Occasionally. Her sleeping patterns have regularized now - though off the drops, she's somewhat more prone to wake around 03:00 seemingly recharged, only to fall back to sleep around 06:00 and then be near-impossible to wake up an hour later - but at 3.5 y.o., we have some success in talking her back into sleep, so it's no longer a big issue.

The drops still come in handy in specific situations that we know will disrupt her sleeping pattern, but that too has become less of an issue. For example, it used to be that car travel in the afternoon would have her sleeping through the whole trip, and then refusing to sleep at night, and it would take a couple of days to get her back to the usual sleeping pattern. But in the last ~6 months, she stopped sleeping so much in the car, and learned to fall asleep if the right ritual is followed.