Seo | Image indexed and visible after days they disappear


when i write a new article - images and i submit the new page via google search console, my pictures are online for the post. But after one or two days they disappear again and cannot be found using a direct search. Not indexed ! Why is it?

I use Webflow CMS, add a description and the alt tag. the pictures are properly optimized and can’t explain that to me.

Normally my pictures can always be found, only this time not and that with more than 8 contributions.

Need help and advice.

Example : Artist Page all images where indexed. I have googled the artist name and all image apere. Today the are all gone. ?!?!?!

Here is my site Read-Only: LINK
(how to share your site Read-Only link)