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Deployments failing since ~21:49 UTC 2026-07-28: 'problems communicating with our content server' (1-file uploads and ARM reads also failing) #1780

Description

@Shlomo9306

Summary: All deployments to our Static Web App fail since ~21:49 UTC today (2026-07-28) with:

We are currently experiencing problems communicating with our content server. Please try again later or file an issue if this behavior continues.

App: default hostname agreeable-bay-07c7a8910.6.azurestaticapps.net (scale unit 6), Standard tier, custom domain, Central US.
Example DeploymentId: 8468890c-7466-41e9-8fbc-426df2bfb24d

Evidence it is service-side, not client-side (5 independent failures, 21:49–23:12 UTC):

  1. GitHub Actions with Azure/static-web-apps-deploy@v1 (Docker / StaticSitesClient) — failed twice.
  2. GitHub Actions with SWA CLI 2.0.9 (StaticSitesClient binary from Azure Front Door, 3 internal retries) — failed.
  3. SWA CLI 2.0.9 from a local Windows machine (different network) — failed at "Preparing deployment".
  4. A single-file (47 byte) HTML upload to a fresh named preview environment failed identically — rules out bundle size/content (the real bundle is only 12.2 MB / 255 files).
  5. An ARM management-plane read (az staticwebapp environment list) returned (GatewayTimeout) The gateway did not receive a response from 'Microsoft.Web'.

The deployment token is valid (the CLI resolves the site and target environment before the upload step fails). Last successful deploy: 2026-07-26 07:05 UTC via the same workflow, unchanged.

Azure Service Health and status.azure.com show no active events for the subscription.

Similar recent reports: #1772 / #1773 / #1774 (July 21), #1777 (July 23).

Is there an ongoing incident affecting content-server uploads (scale unit 6 / Central US)?

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