Describe the Bug

When editing and saving a document in the Payload CMS admin panel, then navigating to a different page and returning via the browser's back button, the previously saved state is not reflected. Instead, the editor shows the old state of the document — the one before the latest save. If a user unknowingly makes changes and hits "Save" again, all recent updates will be overwritten by the outdated version. This behavior leads to accidental data loss. I experienced this several times, unintentionally overwriting previously updated content.

This issue occurs by default — no customizations have been made. It can be reproduced using the unmodified Payload website template.

Link to the code that reproduces this issue

https://github.com/MarvinVrdoljak/payload-bug-report-3

Reproduction Steps

1. Go to the admin panel and open a document for editing.
2. Make changes and click Save.
3. Navigate to a different route.
4. Click the browser’s back button to return to the previous document.
5. Observe: the editor displays the outdated version of the document (prior to the last save).
6. If you now hit Save, this outdated version will overwrite your latest changes.

Which area(s) are affected? (Select all that apply)

area: core

Environment Info

Binaries:
  Node: 22.14.0
  npm: 10.9.2
  Yarn: N/A
  pnpm: 10.10.0
Relevant Packages:
  payload: 3.43.0
  next: 15.3.0
  @payloadcms/db-mongodb: 3.43.0
  @payloadcms/email-nodemailer: 3.43.0
  @payloadcms/graphql: 3.43.0
  @payloadcms/live-preview: 3.43.0
  @payloadcms/live-preview-react: 3.43.0
  @payloadcms/next/utilities: 3.43.0
  @payloadcms/payload-cloud: 3.43.0
  @payloadcms/plugin-form-builder: 3.43.0
  @payloadcms/plugin-nested-docs: 3.43.0
  @payloadcms/plugin-redirects: 3.43.0
  @payloadcms/plugin-search: 3.43.0
  @payloadcms/plugin-seo: 3.43.0
  @payloadcms/richtext-lexical: 3.43.0
  @payloadcms/translations: 3.43.0
  @payloadcms/ui/shared: 3.43.0
  react: 19.1.0
  react-dom: 19.1.0
Operating System:
  Platform: linux
  Arch: x64
  Version: #1 SMP Tue Nov 5 00:21:55 UTC 2024
  Available memory (MB): 15672
  Available CPU cores: 22