What happened?
In v4.0.0-beta.7, the theme’s templates that render:
Markdown images (layouts/_markup/render-image.html)
Header/featured images (layouts/_partials/article/components/header.html)
do not call Hugo image transforms like .Resize, and they don’t emit srcset.
So: even with image processing “enabled”, there are no resized derivatives to serve (for these two cases).
Hugo version
0.155 extended
Theme version
v4 Beta 7
What browsers are you seeing the problem on?
Chrome
More information about the browser
Chrome 145.0.7632.109 Windows 11
Relevant log output
Link to Minimal Reproducible Example
https://github.com/CaiJimmy/hugo-theme-stack-starter