I am using the simple theme and included a full-with image, see https://nuesse.robin-marketing.com/pistazien/ in the middle of the page. It shows that even at resolutions of 1600, the 769px (m) Version is shown, instead of the xl Version. I do not see any mistakes in the config.json file for the correct selection of image sizes. Do you have any suggestion how to solve this issue?
I reproduced it again on: https://www.fenchel.org/pistazien/. Yes, integrated a new image (different name) of 1800px, regenerated thumbnails and synchronized. Again no full width image shown … any guess whats wrong?