Give it time, any change can 'bind' them up.I have confined all birds to their pen and check it multiple times daily for eggs. Yesterday, 0 eggs. The day before, 3.
Might check pelvic points........still think time of year/molting might be the cause.
https://www.backyardchickens.com/articles/who-is-laying-and-who-is-not-butt-check.73309/