Dev Diary #3: The Sneaky Issue That Was Silently Ruining Our Database | HackerNoon
Briefly

The automated virus scanner on specific university .edu email systems were hitting all links in our confirmation emails to check for viruses, including scanning QR codes.
Our customers were experiencing a ticket redemption issue due to unintended interactions with automated systems, which were scanning QR codes before the emails were even received.
Read at Hackernoon
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