I don’t think it’s normal behaviour. When I use Word, it changes the both the link and the label.
You may be confused because I uploaded a screenshot of the dialog box. I didn’t use the dialog box to do any editing - I only showed that to illustrate that the link and label were different.
The exact steps I used were:
Open a Lettera document with a URL in it (the “original” URL)
Go to Safari, select another URL (the “pasted” URL) and copy it using Command C
Go to Lettera, select the existing URL and paste over it using Command V
Observe that the Lettera document now has a URL that has a label with the original URL but a link of the pasted URL
I wouldn’t look to Word for standard macOS behavior. This is what I see in multiple Mac apps, that the label is independent of the URL. After all, you may want the label to be the name of a page, or something else, not the actual URL. If you just paste the URL, it has to add it as a label, and that makes sense.
Oh, I understand now. You’re just pasting the link. Since you posted a screenshot of the dialog, I assumed you were using the dialog to change the link.
If I paste a link without the dialog in Pages, the link isn’t live, so there’s nothing to edit.