Glad that she is back to normal!
I would monitor her for a few days. If you notice her doing that again, it would be worth catching her and taking a look inside the beak for any signs of mucous, lesions, canker or white/yellow plagues.
I hope all continues to go well for you.
Have you noticed only for the day?
Check her crop first thing in the morning before she eats/drinks to make sure it's empty.
What did you worm your flock with?
It's possible she may be experiencing a bit of stridor where she's eaten something and it's not gone down. This usually lasts a...