Widget is an external add-on that is not native to Weebly. Some Weebly platform can have trouble rendering custom codes in editing mode even though there are no code errors. If you are seeing your image widget cut off in editing mode, it means your Weebly platform is not rendering the auto height function properly.
Once the site is published, you will see the image widget function as it is intended like in our demo site. While editing your site, you can preview your image widget before you publish.
Click on “design” and into “edit html/css”. In the W Theme Editor you will see how your website will look when it is published.
Click on image to enlarge to full screen