Steps to replicate the issue (include links if applicable):

• visual editing on [[:th:ฉบับร่าง:ทดลองเขียน]]
• Click on "Cite" then "Automatic"
• uris without prefix of https:// or http://www. or https://www.
  1. archive.org/details/SangitaRatnakaraChapter4
  2. dailypioneer.com/2014/state-editions/constituency-wise-analysis.html
  3. business-standard.com/article/news-ians/alipurduar-becomes-bengal-s-20th-district-114062500725_1.html
  4. unesco.org/new/en/unesco/about-us/who-we-are/history/
• full uris
  1. https://archive.org/details/SangitaRatnakaraChapter4
  2. https://www.dailypioneer.com/2014/state-editions/constituency-wise-analysis.html
  3. http://www.business-standard.com/article/news-ians/alipurduar-becomes-bengal-s-20th-district-114062500725_1.html
  4. http://www.unesco.org/new/en/unesco/about-us/who-we-are/history/

What happens?:

• message error: We couldn't make a citation for you. Try another source or create one manually

What should have happened instead?:

• create citation
• citation output of https://archive.org/details/SangitaRatnakaraChapter4 is

<ref>{{Cite book |last=srangadeva |url=http://archive.org/details/SangitaRatnakaraChapter4 |title=Sangita ratnakara chapter 4}}</ref>

notes

• there is at least 1 minute gap between each uris without prefixes retries and uris with prefixes
• http://www.unesco.org and http://www.business-standard.com/ provides archive.org versions or simply they are 404 urls

Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):