How to use shortcodes within the image caption?

No, this does not work, because shortcodes are not executed in image captions, it shows [Bildanfrage] as plain text.
So something is needed to execute shortcodes in image captions.

No, it does not work at my site, I have added the login details below.

Note:
Posts are made with classic editor.
Pages are made with ALB.

In ALB Image captions brackets like [ … ] are not allowed, there is a warning, so it can not work:

And in posts, which I create only with classic editor, not ALB, the shortcode is not executed, it is just plain text:

For the moment my shortcode should lead to the contact page – but this is not relevant, what content my shortcode has, it will be extended in future.
It should be executed in the image caption and not shown as plain text as you see in my screenshots above.

For the ALB page I have inadvertently set “overlay”, this is what I do not want, I want it below the image, i have corrected it now, but it shows only plain text. I just saw, that is the field “copyright” of media library, not the image caption, sorry, – probably my English was confusing …

Please check the ALB page again. I have inserted the image from media library again and have added THERE [bildanfrage] to the “copyright” field.

– – –

For the POST (with classic editor) the shortcode should be executed – currently a link “Bild anfragen”.
I only want that my custom shortcode is executed at this place – whatever the content of this shortcode will be.

.

I just have found a solution FOR THE POST at Stackexchange and it is quite simple and works, my shortcode just needs a bit more CSS, that’s all.

The snippet is:

function my_caption_shortcode($atts) {
  if (isset($atts['caption'])) {
    // avoid endless loop
    remove_filter( current_filter(), __FUNCTION__);
    // apply shortcodes
    $atts['caption'] = do_shortcode($atts['caption']);
    // restore filter
    add_filter(current_filter(), __FUNCTION__);
  }
  return $atts;
}

add_filter("shortcode_atts_caption", "my_caption_shortcode");

Source

But for the copyright field in media liberary image it works NOT.
Do you have a suggestion based on this snippet for this?

But in the media library the “copyright” field … isn’t it a feature of ENFOLD?

Probably my English is not good enough … I mean how can I extend this code snippet (that I have placed in “Code Snippets” plugin), so that shortcodes are also executed in this “copyright” field in media library, so that I can put a shortcode in exactly this field next to the copyright name (for example):

function my_caption_shortcode($atts) {
  if (isset($atts['caption'])) {
    // avoid endless loop
    remove_filter( current_filter(), __FUNCTION__);
    // apply shortcodes
    $atts['caption'] = do_shortcode($atts['caption']);
    // restore filter
    add_filter(current_filter(), __FUNCTION__);
  }
  return $atts;
}

add_filter("shortcode_atts_caption", "my_caption_shortcode");

Thank you, it works fine concerning the shortcode, working in the copyright field in media library…

… BUT only if I add a caption to the image, too, not only a copyright + shortcode.

When I add only someting in the “copyright” field in media library to the image, then nothing is shown with the image in frontend:

.

However, when I add a caption and then the copyright + shortcode (= ok) in the “copyright” field in media library, then all of this is shown:
.

Could you please alter your latest snippet in that way, that I do not always need an image caption for the output of the “copyright” + shortcode within the copyright-field in media library?
Thank you.

Thank you, it works so far, but I understand the problem that you have described. For this reason I will keep your first snippet, then it works fine. Thanks a lot for your help!