Hey Martin,
For cases like this where a 3rd party plugin is involved, we first need to know if the issue is being caused by our theme. That said, please do the Test For Theme Related Issue. If the issue persists, it means that the problem is with Yoast SEO so you need to forward this issue to Yoast SEO support.
If the issue is fixed by switching to the default WordPress theme like TwentyTwenty, the next step to do is to 2. Test For Plugin Conflict.
If you’re using a child theme, also switch to the parent theme to test if the issue is coming from the child theme.
Only if our theme is proven to be the cause of the issue, please give us the following information in a Secure Note.
- URL of the page having the link issue
- URL of the page where the naked form could be found so that we can compare
- WordPress Login URL
- Admin level username and password
You can find the Secure Note button at the bottom of your posts.
Thanks.