image/remote
image() is given a remote URL. yuanme never fetches a remote image, so it can’t know its size or make smaller copies of it. A remote image in an Entry’s body, or in an <img>, is left as it is.
Example
{{ image("https://example.com/cat.jpg") | picture(alt="A cat") }}
Fix
Save the image in the project and pass its path, or write an <img> with the URL, width and height.