When reloading the page, it fails to load the backup

[jasikpark]

https://user-images.githubusercontent.com/10626596/120861558-1aefaa00-c54d-11eb-99c2-92166ca84b30.mov

Describe the bug

When reloading a page that I have edited, it offers to load the backup of text that I hadn't saved yet, and then immediately replaces that text with the text that is saved.

To Reproduce

1. Open a post
2. add some new text to the body
3. reload the page
4. select "load from backup"
5. watch the new text flash onto the screen, and then the page reloads again without the new text.

Expected behavior

I would expect the backup to work.

Screenshots

Applicable Versions:

• Netlify CMS version: netlify-cms-app 2.15.17 netlify-cms-core 2.40.11 netlify-cms 2.10.137
• Git provider: Github
• OS: macOS 11
• Browser version Firefox 89

• Node.JS version:

CMS configuration

⁄https://github.com/jasikpark/jasik-xyz/blob/main/static/admin/config.yml

Additional context

This could be related to using the page bundles feature w/ Hugo since I'm getting several weird bits with it.

Browser console.log

netlify-cms-app 2.15.17 index.js:25:12
netlify-cms-core 2.40.11 bootstrap.js:83:12
netlify-cms 2.10.137 index.js:27:12
 Checking for Unpublished entries API.js:765:12
TypeError: o is undefined
    previewUrlFormatter formatters.js:187
    getDeploy backend.js:954
    loadDeployPreview deploys.js:84
    Redux 2
    loadDeployPreview Editor.js:410
    componentDidMount EditorToolbar.js:441
    React 2
    unstable_runWithPriority scheduler.production.min.js:19
    React 4
    unstable_runWithPriority scheduler.production.min.js:19
    React 4
    Redux 7
    retrieveLocalBackup entries.js:604
    Redux 2
    componentDidMount Editor.js:239
    React 2
    unstable_runWithPriority scheduler.production.min.js:19
    React 4
    unstable_runWithPriority scheduler.production.min.js:19
    React 4
    Redux 7
    loginUser auth.js:110
    promise callback*t.loginUser/ index.js:10
    Webpack 5
react_devtools_backend.js:2560:23
TypeError: o is undefined
    previewUrlFormatter formatters.js:187
    getDeploy backend.js:954
    loadDeployPreview deploys.js:84
    Redux 2
    loadDeployPreview Editor.js:410
    componentDidMount EditorToolbar.js:441
    React 2
    unstable_runWithPriority scheduler.production.min.js:19
    React 4
    unstable_runWithPriority scheduler.production.min.js:19
    React 4
    Redux 7
    k editorialWorkflow.js:308
    r Redux
    loadEntry withWorkflow.js:66
    componentDidMount Editor.js:244
    React 2
    unstable_runWithPriority scheduler.production.min.js:19
    React 4
    unstable_runWithPriority scheduler.production.min.js:19
    React 4
    Redux 7
    loginUser auth.js:110
    promise callback*t.loginUser/ index.js:10
    Webpack 5
react_devtools_backend.js:2560:23