Postmortem: Workflow Delays Caused by Google Sheets Step

Update timeline

1. identified Jul 29, 2026, 08:30 AM UTC

   Workflow events and steps began to be delayed, with actions not appearing in real time. Actions were still being carried out, but with a delay of around 20 minutes.

2. investigating Jul 29, 2026, 04:35 PM UTC

   We have confirmed that this is affecting multiple workflows and multiple users, not an isolated case. Delays of up to 40 minutes have been observed between a workflow being triggered and its steps completing. Our team is continuing to investigate the cause.

3. investigating Jul 29, 2026, 04:42 PM UTC

   We have identified the cause. Workflows containing an "Add Google Sheet Row" step are being held at that step, which blocks every step that follows in the same workflow. This has created a backlog that is also delaying other workflows sharing the same processing capacity. Our...

4. resolved Jul 29, 2026, 06:20 PM UTC

   Incident Summary Between 5:30pm on 29 July and 1:20am on 30 July 2026 (+08:00), workflows containing an "Add Google Sheet Row" step were delayed. Because a workflow pauses at that step until it completes, all following steps were also held up, and the...