Widgets such as the multi input widget convert the inputted text into a box upon losing focus or pressing enter, to allow multiple separate texts to be added. If text has been input but not converted when the widget's content is requested, the unconverted text is ignored. Because the make request button does not take focus when clicked (perhaps this is more a OOUI bug, then), the last input does not get converted, and thus gets ignored in the request. Clicking the button a second time, or pressing enter or clicking somewhere else before clicking the button will work as expected.
Steps to reproduce:
- Enter text into a field such as titles, but do not press enter or click enterwhere else
- Press make request. Note that the text is ignored
- Press make request again. Note that the text is now included