I think the problem is the preview and full image processing of nextcloud. It is very stupid.
A few nextcloud images:
https://nc.nl.tab.digital/s/MPwckd37x2WxAXM
Lets look at “Library.jpg”.
Preview Image - first version:
Klick on “Library.jpg” then right mouse klick and “save to:” : 1537-1024.jpg
Preview Image - second version
Image Preview: https://nc.nl.tab.digital/s/3ARKNM7zaj9yBMF
Klick then right mouse klick and “save to:” 1024-682.jpg
Full Image - first version:
https://nc.nl.tab.digital/s/MPwckd37x2WxAXM
-> then Download on Image “Library.jpg”
-> filename: Library.jpg, 1600x1066 pixel
Full Image - second version:
https://nc.nl.tab.digital/s/3ARKNM7zaj9yBMF
-> then “Download” or https://nc.nl.tab.digital/s/3ARKNM7zaj9yBMF/download
-> filename: Library.jpg, 1600x1066 pixel
Perhaps someone can post a link to or a documentation to show the original image direct in Nextcloud. I think that is not possible.
Ok you can use https://apps.nextcloud.com/apps/sharingpath