UI stuck in "Provisioning app backend", "Deleting backed env" and "Creating backed env" loop

### Before opening, please confirm:

- [X] I have installed the latest version of the Amplify CLI (see above), and confirmed that the issue still persists.
- [X] I have [searched for duplicate or closed issues](https://github.com/aws-amplify/amplify-cli/issues?q=is%3Aissue+).
- [X] I have read the guide for [submitting bug reports](https://github.com/aws-amplify/amplify-cli/blob/master/CONTRIBUTING.md#bug-reports).
- [X] I have done my best to include a minimal, self-contained set of instructions for consistently reproducing the issue.

### How did you install the Amplify CLI?

npm

### If applicable, what version of Node.js are you using?

v15.14.0

### Amplify CLI Version

4.52.0

### What operating system are you using?

Mac

### Amplify Categories

api

### Amplify Commands

push

### Describe the bug

The only thing I did was change a type from String to an enum type, in one of the models. and did amplify push --y
did similar things so many times this week but never faced an issue.

The cli gets stuck at :

```
✔ Generated GraphQL operations successfully and saved at src/graphql
⠼ Updating resources in the cloud. This may take a few minutes...
GraphQL schema compiled successfully.
```

upon going to the amplify console online, I see:


on refresh:

on refresh:

then it goes back to completed, and never finishes.

The change is deployed to AppSync, since I see it when I run my mutation.

everything is fine but the backend is stuck and not allowing any more changes since its stuck in some unknown state.

If I use a separate terminal instance and run amplify push with a small change, it throws:

`Failed to create models in the cloud: ValidationException - An error occurred while processing your request: ValidationException: There is already a pending job for the requested appId: dckq06nq2cy6m and backendEnvironmentName: dev, wait for it to complete before creating a new job.`

### Expected behavior

cli finishes and backed is in completed state.

### Reproduction steps

unable to reproduce

### GraphQL schema(s)

```graphql
# Put schemas below this line

```

### Log output

```
# Put your logs below this line

```

### Additional information

_No response_

Start with the `amplify push` entry point and the reported AppSync/backend-environment provisioning flow, using the pending-job ValidationException as the initial symptom. Reproduction is currently unavailable and no logs or schema are provided; done means the CLI finishes and the backend environment returns to completed so another push can run.

Written by the indexing model from the issue text.