Minecraft Realms Server has been resetted/put back 2 days behind

What I expected to happen was...:
The server to continue where I last stopped.

What actually happened was...:
The server has been resetted and 2 days of gameplay have been lost

Steps to Reproduce:
I think it's due to an overload of mobs/animals. I had 2 fully automatic chickenfarms running, but the amount of chickens wasn't that high in my opinion.

-Thanky you