[Customer Issue] App crashes when adding items to cart

Hi, I'm trying to add items to my cart on the Grubify app but it keeps crashing. I get a server error after adding about 5-6 items quickly. The page just shows a generic error message.\n\nThis started happening today around 3pm. Can someone look into this?

🤖 Grubify SRE Agent Bot

Classification: Bug — API Bug
Severity: High

Analysis:
The user reports a server error when rapidly adding 5-6 items to the cart, suggesting a potential race condition or concurrency issue in the Cart API (/api/cart). The error is reproducible and started at a specific time, which may correlate with a recent deployment or backend change.

Next Steps:

Engineering team to review CartController.cs for concurrency handling on rapid sequential POST requests.
Check application logs around the reported time (~3pm) for exception stack traces on the cart endpoint.
Verify if the in-memory cart storage has any thread-safety issues under concurrent writes.

✅ Status: Triaged — ready for engineering review

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[Customer Issue] App crashes when adding items to cart #1

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[Customer Issue] App crashes when adding items to cart #1

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dohl-ms commented on May 14, 2026

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