🇦🇹Austria elek
Had the same problem.
Confirmation mails are send as plain-text (see /admin/config/content/formats).
If this plain-text format has "Convert URLs into links" enabled you have to put a higher value in the option "Maximum link text length".
That solves the tuncated links.
🇦🇹Austria elek
Thank you @mpdonadio, #3 made all clear for me. Don't know why I hat US-english instead of german in my browser settings. Well, I don't care or play around with those settings.