I have no idea where this egg on the right came from

These eggs are from my chickens, but I’ve never seen that tan speckled egg before on the bottom right. Do you think any of these layers could have laid that speckled one? It would also mean that one of them laid two eggs today which would be weird for all of them too.

I’m thinking the copper maran? she’s only ever laid those chocolate eggs though. Or we had a strange chicken sneak into the coop 🤣 I’m so confused!