Bug Report: Image Upload from Device Not Updating

Describe the bug

When uploading an image from the local device using Decap CMS, the image is visible in the CMS editing panel but is not reflected in the live preview/output. Uploading via URL works as expected.

To Reproduce

1. Go to https://demo.decapcms.org/
2. Open any editable entry (e.g., a blog post).
3. Choose the image field from + icon.
4. Click "Choose different image" and select an image from your local device.
5. Check the preview
6. Issue: The image doesn’t appear in the preview.
   (However, uploading an image via URL works correctly.)

Expected behavior

Images uploaded from the device should:

• Save to the configured media folder in the repo.
• Display immediately in the preview.
• Appear correctly in the published post.

Screenshots

Example:

• Left (CMS editor) – Image shows in the field after upload.
• Right (Preview) – Image is missing.