Apparently search interferes only with some URLs: 0) Copy this url: "https://forums.spacebattles.com/forums/worm.115/" 1) Search anything (I use ddg, load the page completely) 2) Tap the url-bar. Notice no url, just the search. 3) Remove the search, "Fill link from clipboard" appearch, tap it. 4) Tap the URL-bar. The original search appears again. Unable to edit copied url.

The search stays present as long as the URLs with the same behaviour are entered manually, from history, or pasted. Most urls reset the behaviour. I have three from different domains. One is a top-level URL, the others are not. The top-level of the example does not have this behaviour.