i18n: "Fill in from another locale" appears to do nothing

[tpluscode]

Describe the bug

As a follow

To Reproduce

1. Set up i18n
2. Create a new item
3. Write some content in default language
4. Choose Fill in from another locale and select another locale

Expected behavior

The content in the second language should be immediately updated. Instead, it is necessary to switch the language back and forth for the UI to update

Screenshots

Screen.Recording.2025-06-12.at.14.44.02.mp4

Applicable Versions:

• Decap CMS version: 3.6.4
• Git provider: local
• OS: macos
• Browser version: Brave 1.79.119

• Node.JS version:

CMS configuration

backend:
  name: github
  branch: main
  repo: zazukoians/decap-i18n

publish_mode: editorial_workflow

# These lines should *not* be indented
media_folder: "img" # Media files will be stored in the repo under static/images/uploads
public_folder: "/img/" # The src attribute for uploaded media will begin with /images/uploads

i18n:
  structure: multiple_folders
  default_local: de
  locales: [de, fr, it, en]

collections:
  - name: Showcases
    label: "Showcases"
    folder: "showcases"
    i18n: true
    extension: md
    widget: "list"
    create: true
    fields:
      - label: Title
        name: title
        widget: string
      - name: body
        label: Body
        widget: markdown
        i18n: true

[tpluscode]

Also, with the i18n UI switch disabled, when I "fill in" on the left, the previous is actually updated. But not the editors