Custom domains stuck in Deleting/Failed across four Static Web Apps; stuck records block resource deletion

Four Static Web Apps in one resource group each have custom domain records stuck in

Deleting or Validation failed. No domain can be bound, and the stuck records also

block deletion of the Static Web Apps that own them.

Subscription: 8790XXXX780a

Resource group: rg-XXv-weu

Region: West Europe

DNS: CloXXunproxied

staxXXXsupxweu suppXXXXXamics.com Deleting

                           devXXXXXXamics.com    Validation failed
```  stapp-supportdocs-dev-weu    docs-dev.bydynamics.com       Deleting

```dockerfile
                          XXXXXXXXXamics.com        Validation failed
```  stapp-supportdocsb-dev-weu   docs-dev.bydynamics.com       Deleting

```yaml
                         XXXXXXXXXXom       Deleting
```  stapp-supportdocsc-dev-weu   docs2-dev.bydynamics.com      Validation failed

```sql
                           dXXXXXXXXXXXics.com      Validation failed
```WHAT I TESTED

Seven hostnames, four resources, both validation methods, both record orders:

  app          | health                    | method              | CNAME first | result

  -------------|---------------------------|---------------------|-------------|--------------------------

  docs (old)   | broken                    | CNAME               | -           | failed

  docs (new)   | healthy                   | CNAME               | yes         | failed

  docs (new)   | healthy                   | CNAME               | yes         | failed

  docs (old)   | broken                    | TXT + _dnsauth      | no          | reached Adding, failed

  portal       | healthy, had stuck record | TXT + _dnsauth      | yes         | failed at validation

  experiment   | healthy, never had domain | TXT + _dnsauth      | yes         | reached Adding, failed

  experiment   | healthy, never had domain | TXT at bare name    | no          | failed at validation

The last row followed the documented procedure exactly: no CNAME on the name, TXT

at the host as displayed in the portal, on a resource created minutes earlier that

had never held a custom domain, with a hostname never used anywhere.

EVERY FAILURE RETURNS THE SAME THING

  {"code":"ResourceOperationFailure",

   "message":"The resource operation completed with terminal provisioning state 'Failed'."}

subStatus is empty - no 409, no 403 - so the request is accepted and fails inside

Microsoft.Web.

  

STUCK RECORDS ALSO BLOCK RESOURCE DELETION

Deleting stapp-supportdocsc-dev-weu fails with "Failed to delete Static Web App

... with error: Failed". stapp-supportdocs-dev-weu fails identically.

I confirmed this is caused by the stuck records rather than a broader problem: I

created a throwaway Static Web App with no custom domains, and it deleted without

issue. Only apps carrying stuck domain records refuse deletion.

This means I cannot delete and recreate as a workaround, and I cannot remove the

affected resources from my Bicep deployment stack - it uses

actionOnUnmanage=deleteResources, so a failed delete would break the deployment.

RULED OUT, EACH CHECKED

- DNS: every record verified resolving from 8.8.8.8, 9.9.9.9 and 208.67.222.222

  - DNSSEC: zone signed, DS delegated, validating correctly

  - CAA: no CAA records at apex or on any subdomain

  - Cloudflare proxy: every record DNS-only (grey cloud), never proxied

  - Front Door / CDN: none in the subscription; enterpriseGradeCdnStatus is

    Disabled on all four apps

  - Locks: none. Azure Policy: none. A lock returns ScopeLocked and a policy

    returns RequestDisallowedByPolicy; neither appears

  - Permissions: caller is Global Admin, event JSON shows the write action granted

  - Slice: all four apps are in slice 7, so a hostname bound to one cannot bind to

    another - this explains docs-dev but not the hostnames never used anywhere

REQUEST

Please release the stuck custom domain claims on all four Static Web Apps so the

domains can be bound and the unused resources deleted.

This appears to be the same failure mode as:

[https://learn.microsoft.com/en-ie/answers/questions/5941577/azure-static-web-app-custom-domain-stuck-in-deleti]()

where a backend mitigation was applied by the product team.

My subscription has a Basic support plan, so I cannot open a technical support

request.