Redirect from another source site does not work

[ammannbe]

Bug or feature request?

• bug
• feature request

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Describe the bug or feature

If I create a new redirect with another Source Site which has a prefix (e.g. "/en") in the url, the redirect does not work and only shows the default 404 page.
I've found out that if you leave the prefix out in the URL, the redirect works.

Reproduce (if bug)

Steps to reproduce the behavior:

1. Go to 'Site Redirects -> Redirects'
2. Click on 'New redirect'
3. Change the source and destination site to one with a prefix (e.g. "/en")
4. Enter the URL (without the prefix)
5. Open the source URL in your browser
6. See the 404 error page

Expected behavior

Either you shouldn't show the prefix in the source URL or we should be able to leave it away in the URI.

Screenshots

Version (if bug)

• Craft version: 3.7.10
• Plugin version: 3.0.8
• PHP version: 7.4