Google Merchant Center transfer in Bigquery doesn't return data for yesterday but 2 days ago

Question

I schedule the transfer to run at around 4 am every day and it usually returns data with product_data_timestamp for the day before. However, today it only returns data with product_data_timestamp for 2 days ago. I've tried to run the transfer again at 11 am and create a new transfer at 2 pm but it still doesn't return product_data_timestamp for yesterday but 2 days ago. I have never seen this happen before. Do you have any idea why and how to solve this? Thanks in advance.