Maybe there was someone in the favorite nest so a hen laid in a completely different place and others followed suit.
They all have a book titled "When they think they have you figured out change it up to keep them guessing". :lau
You are very welcome.
I laugh at my girls every day. There are 4 nests currently and 12 birds old enough to lay (actually all 12 are over 5-6 years old). I find eggs in only 2 nests, nine eggs total in just the 2 nests.
Before long my 11 pullets will be laying. I plan to add a few nest boxes...
You only need 1 nest box for every four hens so if you have 24 hens you need six nest boxes.
I prefer shavings for the nests.
I think they would like pulling apart a bale of hay. I would put that in the run.
It is normal for them to take a day off every now and then. Sometimes (often) those days off are on the same day as another bird.
It's 1000% normal.
They will also slow or completely stop laying for a "winter break". Many will lay through their first winter but that second winter they need...