Hi @salshine
It’s possible that you have an issue with the max_input_vars variable. Could you please check this page to learn more about it: https://www.advancedcustomfields.com/resources/limit-number-fields/
If the issue persists, could you please open a new ticket and provide the credentials to your site here: https://support.advancedcustomfields.com/new-ticket?
Thanks 🙂