screenshot of the dialogue
I added TemplateData to Template:X1 (this is a sandbox)
Then, I go to my personal sandbox User:Waihorace/sandbox/VE to try adding Template X1 to that page.
I pressed the button that allow me to add template (don't know its exact English wording)
It prompt me to enter a template name, so I typed in X1
Then, it comes out that the description is not shown, parma names are not shown, but the list of parma is given for me to choose.
Why the description and the name and description of the parma is not shown, while https://zh.wikipedia.org/w/api.php?action=templatedata&titles=Template:X1&format=jsonfm works?
( X1 is a template which will be cleared by a bot automatically. To reproduce, check if the content is still there or otherwise revent back to oldid=27156695 )