Entity changes not saved when I use "Save & Quit"

when i brang to my city two villagers and made them breed then i killed them all, when i dave and close the game and open it again, i found them still alive, this issue repeated about more than 10 times till now.

link to the video explaining the issue:

https://drive.google.com/file/d/1jCV8H30sAKQKEZ9hxuwwKYMUlM7Ow7GT/view?usp=drivesdk