Custom domain stuck in "Deleting" state for 7+ hours — every delete attempt Accepted (202) then Fails; cannot re-add

[rajankanwar20-netizen]

Describe the bug
Adding custom domain www.canterrastays.com to Static Web App swa-canterra-prod
(resource group rg-canterra-prod, region: Canada East) failed at 2026-08-13T02:23 UTC
with "An unknown error has occurred while adding your custom domain." The Validate step
SUCCEEDED (HTTP 200) — the Create step itself failed ~10 minutes later.

The domain record is now stuck in Deleting for 7+ hours. Every delete attempt —
Azure CLI, direct ARM REST DELETE (api-version 2023-12-01), and the Azure portal —
is Accepted (202), runs for ~6–10 minutes, then transitions to Failed with no substatus.
The portal permanently shows the record as "Deleting."

DNS is verified correct: CNAME for www.canterrastays.com resolves to
brave-sand-01c38990f.7.azurestaticapps.net via 8.8.8.8.

Activity log timeline (UTC, 2026-08-13):

• 02:23:50 Validate Custom Domain — Succeeded (200)
• 02:23:52 Create Custom Domain — Accepted (202)
• 02:33:55 Create Custom Domain — Failed
• 02:39:08 Delete — Accepted (202) → 02:49:16 Failed
• 03:06:41 Delete (ARM REST) — Accepted (202) → 03:16:43 Failed
• 03:10:10 Delete — Accepted (202) → 03:16:44 Failed

Correlation IDs from failed operations:

• Create Failed: 1d37b8f4-d898-4228-a2bb-4223bea8207e
• Delete Failed: 25cbedf0-0c69-43af-bd31-057c709ca26e
• Delete Failed: f459b097-a458-41aa-a7fc-69040d5b0c72
• Delete Failed: c9908161-4c09-4c03-8a75-e9b3557484cb

To Reproduce

1. az staticwebapp hostname set -n swa-canterra-prod -g rg-canterra-prod --hostname www.canterrastays.com
   → fails with unknown error despite successful validation
2. az staticwebapp hostname delete -n swa-canterra-prod -g rg-canterra-prod --hostname www.canterrastays.com --yes
   → Accepted (202), then Fails after ~10 minutes
3. Record remains in "Deleting" state permanently; no client-side path can remove it

Expected behavior
Delete should remove the corrupted custom domain record so the domain can be re-added.

Subscription: 678a78fc-be41-48cc-b123-6f4570991070
SWA default hostname: brave-sand-01c38990f.7.azurestaticapps.net
Platform: Linux consumption (Flex)

Requesting backend cleanup of the stuck record. Happy to provide anything further.

[NZEnergyJoey]

Having the same issue after 15h. Would be keen if you ever resolved this.

[tvriesde]

Same, for 2 days now.

[itoledo]

having the same issue. tried everything.

[wiwi1234]

same issue. Got stuck