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RebuyIncident detail
Checkout Extensions Not Rendering
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Incident updates
Every update Rebuy posted, oldest to newest, exactly as it appeared on their official status page.
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Description
On February 24th at 3:11 PM EST, a code change was deployed as part of a security improvement. The following morning at 8:35 AM EST, merchants began experiencing Shopify Checkout Extensions not rendering. Core checkout functionality remained operational and no data was lost or corrupted.
Root Cause:
The deployed change introduced a data shape update that was not reflected in the Checkout Extension schema, causing validation to fail during extension initialization and preventing extensions from rendering.
Resolution:
Our engineering team identified the mismatch and deployed a fix at 10:05 AM EST on February 25th, restoring full Checkout Extension functionality.
Next Steps:
Review and improve existing monitoring coverage for extension initialization failures to ensure alerts fire as expected. Additionally, introduce cross-functional review requirements for changes that touch shared data contracts to catch downstream impacts before deployment.
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