User blog comment:DaNASCAT/Technical Update: August 15, 2016/@comment-24053170-20160816052102/@comment-24473195-20160817111520

> The problem is, that without it everyone has to add the infobox information by hand now. While you can still make pages and everything you can no longer check to see if you have made any mistakes or if the image shows up until after you make the page itself.

I just looked at the infobox in the image, and it seems that these infoboxes were recently changed to portable infoboxes, and it is clear that the portable infobox doesn't show its parameters in the old editor unless someone also uses the parameters e.g. somewhere within the template.

This isn't really a bug. It is  a conscious decision by the developers. Anyway,this needs to be sorted out in the wiki itself, and again, is completely unrelated to anything in this update. VisualEditor  still shows them properly.