ChatGPT UTM Bug Sent Referral Traffic to Direct During the GPT-6 Rollout
This story is from 2026-10-16. It is preserved in the archive; the latest stories are on the live feed.
A temporary change in how ChatGPT handled outbound links distorted a key marketing metric during the GPT-6 rollout in October 2026. UTM parameters identifying ChatGPT as the source disappeared from some links, while browser settings on some opened links also suppressed referrer information. The res…
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- 2026-10-16 22:30 · DEV Community — AI
ChatGPT UTM Bug Sent Referral Traffic to Direct During the GPT-6 Rollout