Days played counter is broken/gets reset

Before the 1.21 update I created an experimental copy of my world so I could test the Days counter and I was almost at 2000 days. Now after the update my actual world (not the experimental copy) says 120 days played?

I will be sending an older copy of my world with 1800 days and a new that with many days passed that "has" 120 days.

Google Drive Link:

https://drive.google.com/drive/folders/1dCS1xxYXYfwtStcuuycTofpBxiKO0DzJ?usp=sharing