Orders occasionally hang while the payment provider responds slowly during high traffic windows.

Context

• Region: EMEA
• Environment: mobile web
• Reporting team: Customer Success
• Observed release: v1.12.1
• Impact level: moderate

Reported Behavior

• Orders occasionally hang while the payment provider responds slowly during high traffic windows.
• Scope: regional rollout
• Root cause hint: deployment timing differences

Reproduction Steps

1. Add an item to the cart.
2. Proceed to checkout between 11:00 and 13:00 UTC.
3. Submit payment and wait for confirmation.

Expected Result

• The order should complete within a few seconds even during peak load.

Investigation Notes

• Compare feature flags and backend release versions across regions.
• Retries improve the success rate but do not fully eliminate the issue.
• Correlates with gateway latency spikes.

Impact

• Users abandon checkout after waiting too long and some orders remain in a pending state.
• This issue affects EMEA customers and is prioritized as moderate.