Live Template demo can't work

https://plugins.jetbrains.com/docs/intellij/new-macros.html#check-plugin 

According to the doc, I run the demo and highlight the text and enter Ctrl/Cmd+J to open the Select Template popup. Confirm that the SDK: Convert to title case is available in the popup, and select it.

But it can't work. I check the code and find the method `TitleCaseMacro#calculateResult` can't get that text I selected. it's empty string.

Later, I find that when I use ** Ctrl + Alt + T**. Confirm that the SDK: Convert to title case is available in the popup, and select it.It works!!!

So, is it my fault or the document's fault?