Image Thumbnails Disappear from Media Library

Dear Team,

We are currently running our website [ redundant link removed ] and facing below issue.

The feature image disappears from our website every 15 days of upload. We checked our backend and saw that all the images are there on the backend servers however the same disappears from the post. For Eg:

Feature image for story /govt-expels-spanish-nun-after-50-years-of-social-service/ has disappeared.
However, if we go in the backend and click on the image url /wp-content/uploads/nun-Enedina.jpg which is connected to this story we can see the image.
This issue started from 27th July 2019 and if you see the website all the images uploaded as feature post on or before 27th July 2019 are visible on the website.

As a temporary solution we use thumbnail regenerate plugin on the backend of our website and then re-post all feature images however this lasts for a day only.
– I disabled all the plugins – problem persisted
– I changed the permissions to 755 for folders and 644 for files and also the other permissions were applied and the problem still persist.
– I checked the .htaccess files and the problem still persist.
Please help us on this issue as soon as possible.

• This topic was modified 5 years ago by Jan Dembowski.

The page I need help with: [log in to see the link]