How a "safe" shipping change silently disapproved 621 products in Google Merchant Center

Short summary

A Shopify store owner split shipping policies into domestic and international, causing 621 of 739 products to be disapproved in Google Merchant Center due to a sync-order race. The root cause was Google's feed re-sync reading new policy structures before rates propagated. The fix was collapsing policies back into one. The author built a diagnostic toolkit that groups disapprovals by root cause rather than by product, saving hours of manual investigation.

• •Splitting shipping policies caused 84% product disapproval overnight due to a sync race in Google Merchant Center
• •Merchant Center UI reports symptoms (missing_shipping) not root causes (account-level settings changes)
• •A custom diagnostic tool groups disapprovals by root cause, separating real revenue-impacting issues from cosmetic warnings

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