Hey, I checked the image size settings and it’s like in the documentation. Also I regenerated all my images with the plugin ‘Force Regenerate Thumbnails’. The wrong presentation of the featured slider comes only in portrait mode on mobile phone (see in picture 1299-1301). On picture 1302 it looks great. In landscape all images look fine.
On picture 1303 you can see the ‘layout 2’ with featured post in portrait mode on mobile. Could it look like in ‘layout 1’, means with full-width thumbnail and post title under the thumbnail. On desktop both layouts look great. I think the images in ‘layout 2’ are to small on mobile presentation.
Another small detail, there is a space between the blue line and the ‘home button’ on mobile presentation.