User blog comment:DaNASCAT/Technical Update: August 15, 2016/@comment-24053170-20160816052102/@comment-24473195-20160816193034

"Before the update I was able to change the caption, the picture, the color, the title and more. Now I don't get anything but the image width and even the image doesn't show up anymore. This also prevents users from designing new pages normally and makes it impossible to add images to infoboxes that didn't have them before."

I think you must be confused. What you are showing there is the unmaintained Classic editor. The parameters you see there depend on those you have defined on the template. This update hasn't changed any of them (I tested it just now). Your confusion must come from the fact that there is a Template editor that also edits Classic infoboxes and could preview them too. This announcement is about the Infobox preview tool that is completely unrelated to the one you are talking about.

Frankly they've deprecated the Classic RichText editor ages ago, and staff isn't likely to fix anything related to it. So it might be a good idea to use the Source editor if you aren't interested in using the VisualEditor.