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

**Describe the bug**

As a follow

**To Reproduce**

1. Set up i18n
1. Create a new item
2. Write some content in default language
3. 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**

https://github.com/user-attachments/assets/0ffbd7dc-c014-4f3e-8c57-49b451dfb5a2

**Applicable Versions:**

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

- Node.JS version:

**CMS configuration**

```yaml
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
```