I agree with everything
@Wyorp Rock said. Glitches can have all sorts of reasons, stress (which can be caused by just about anything), diet, illness, etc. Many times it's a one time thing, and never recurs. Age of bird can sometimes be a factor, young new layers tend to have glitches while getting it all figured out. Birds going into or out of lay (molt or season) can have glitches. Older birds that may be getting near the point where they stop laying altogether can have glitches. If she's acting fine, then I would just keep an eye on her, see if it happens again or there are further issues, or if all returns to normal. I would pay more attention to how many treats and really limit that, those can dilute nutrition and lead to problems. If the feed was the whole grain type, those can sometimes cause issues due to birds only picking the bits out that they like and leaving the rest, which can lead to deficiencies. A pellet or a crumble type doesn't let them do that. You didn't mention oyster shell, so if you are not, you also should have that available in a separate feeder. There is calcium in layer feed, but needs can vary bird to bird, season to season. Heavy layers may need more, older birds that don't lay as often may need less. Having it free choice allows them to take what they need. Many of us feed all flock feeds rather than layer and keep the oyster shell (or mixed 50/50 with saved crushed eggshells) available all the time. Roo's don't need the extra calcium in layer feed, and if you have older birds that don't lay often or have stopped, they also don't need the extra calcium. Too much calcium can also lead to health problems (kidney issues, gout). I find that doing it that way, I don't often have shell quality issues.