Justified text with a link

Does anyone have the impression that sometimes, while link texts are broken across lines, the text before the link and the text after the link are justified independently of each other?

Let me make an example. Say that we have the following text

Grafica basata su un'immagine di Andreas Trepte, CC BY-SA 2.5,
<hlink|https://commons.wikimedia.org/w/index.php?curid=10979574|https://commons.wikimedia.org/w/index.php?curid=10979574>

Today it happened, with a similar text in a big figure caption, that Grafica basata su un'immagine di Andreas Trepte, CC BY-SA 2.5, was stretched as if to fill an entire line. I added more text in front of that in the same caption and gradually the typeset text looked better. Now removing the text I added does not seem to bring back the initial “stretched text” appearance.

Did anyone encountered this behaviour of the typesetter?

Yep, I think you are right. I was able to recreate the behavior you mentioned, but for me the text returns to his original state after removing the “filling” text.