List of steps to reproduce (step by step, including full links if applicable):

• Enter a wikipedia page and click "edit".
• Insert a full reference (URL, author name, title, website name, dates).
• Now, do it again, you'll see that you can't fill basic things like website name.

What happens?:
I can't fill essential things in the reference like the website name, so I have to save every time I want to insert a new reference. That sucks because it is annoying and other wikipedians can think you're trying to increase your number of edits.

What should have happened instead?:
The software should be showing these now hidden fields like before. I work with very long articles with more than one hundred diffrent references and this bug is annoying me.

Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc:
Portuguese wikipedia, Google Chrome.