Why does my link in Twitter show up twice?
Why do you get a duplicate link on your Twitter posts?
Bad example how you get the duplicate link on twitter (add the link and it generates the thumbnail):

How it will be viewed on mobile:

How will be viewed on web:

To avoid this situation you need to keep only one of the links:
You need to keep only the link from the Caption or from the Thumbnail created.

Updated on: 12/07/2022
Thank you!