I found a strange bug (similiar to one when you add UL LI list, and on next login/edit it get’s deleted when trying eidt using backspace)
- drag and drop image (bigger one)
- publish
- check your site (image contains various srcsets)
- logout
- login
- do some changes (e.g. add some text)
- publish
- srcset is changed (size variants removed, only the smallest stays), also the image is blurred (smallest size)