Dev unpacks three-layered bug that made one chat appear as four dashboard cards

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A developer building Neverclosed, an AI receptionist platform for small businesses, discovered that a dashboard bug was causing single customer conversations to appear as multiple duplicate cards. Investigation revealed three independent root causes stacked together: two separate workers were each logging the same chat event, speaker labels were inconsistent between the two workers confusing the transcript parser, and the deduplication key was based on a sliding message window that shifted across long conversations. Because the bugs were compounded, fixing any one of them in isolation still left the symptom intact, making each partial fix appear to have failed. The resolution involved designating a single logging source, updating the parser to recognise all historical speaker labels, and switching the deduplication key to a stable room ID embedded in each event. The fix was significant for the product, whose core value proposition is providing business owners with a fully auditable AI interaction log.

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