When asked for sources I naturally start typing the shortest possible "example.com". That seems to work at first but later creates surprising results in the article. Playing around more I noticed I can type all these:

• example.com
• www.example.com
• http://www.example.com
• http://example.com

These are all accepted, all displayed as 4 identical shortened "example.com" in the UI, but not detected as duplicates. Later in the article my original input is used:

Issues:

• These are not detected as duplicates, even if they are displayed as identical "example.com" in the UI.
• The missing "https://" is not added in the final article.