Broken Checkout Flow

• “Proceed to pay” not working • Cart/discounts vanish on refresh • Address/OTP loops

Payment Gateway Glitches

• Failed captures, double charges • Wrong currency/taxes •Callback/webhook timeouts

Inventory Sync Mismatch

• Out-of-stock sold as available • Delayed ERP updates • SKU mapping errors

Search & Filter Fail

• Irrelevant results, empty pages • Filters don’t combine • Sort resets on back

Crashes & Memory Leaks

• App quits on product detail • Image cache bloats RAM • Infinite scroll freeze

Impact

• Lost orders & trust • Higher support costs • Uninstalls spike

Quick QA Checks

• Test full cart → pay → refund • Simulate low network/2G • Multi-device, OS versions

Prevent It

• Monitor logs & APM • Auto tests for checkout & pay • Blue-green releases + rollbacks

Don’t let hidden bugs kill sales.