Hi Bart,
Thanks so much for your report!
User and author are not the same thing. The ACF dynamic data tag for the field only refers to the user, which is why it works on the author page. Within a post, however, it relates to the logged-in user, not the post’s author.
You can use the author_meta dynamic data tag to establish the reference to the author. Assuming my ACF field key is “user_website” I can query it this way:
{author_meta:user_website}
Let me know if it works.
Best regards,
timmse
