Once, a customer complained that we had corrupted their documents on our platform. Seemingly out of nowhere, words like "Messi" and "Zidane" started appearing c

Once, a customer complained that we had corrupted their documents on our platform. Seemingly out of nowhere, words like "Messi" and "Zidane" started appearing countless times in the titles and content of their documents - overnight. It was so bizarre and random. We eventually found out they had a broken browser extension (something similar to Google Translate, I don't remember). I was only able to find a single instance of such a bug elsewhere, on a Microsoft support forum — the guy was furious that Outlook would insert 'Messi' and 'Zidane' into his emails every time he tried to send them. Something very specific seemed to trigger it.