@stilltrell, I am having this issue too in Safari 15. This only seems to be happening in Tab Groups, not in the main tab area.
Here's what I see happening ... if you go to Safari > Preferences > 'New tabs open with' there are 4 options:
- Start Page
- Homepage
- Empty Page
- Same Page
I am finding that in Safari 15 Tab Groups (new feature), ALL new tabs open with whatever you have set above.
When you click the carfax link (or any link that opens in a new tab), watch the address bar. It looks like it opens the link and then quickly redirects to your new tab setting above. From what I can tell it's a bug and I do not have a solution.
The work around is to right click on the link, 'Copy Link', and paste it into the new tab to open.
Here is the Reddit Thread on the issue: https://www.reddit.com/r/Safari/comments/ps4l7z/open_link_in_new_tab_taking_me_to_my_start_page