I found an annoying bug on yarpp widget.
1. add the widget to your sidebar.
2. add some title.
If you go to the site, you will see the related post with the widget title.
Now, To recreate the BUG:
1. go back to the widget area.
2. edit the YARPP widget.
3. select the "Display using a custom template file".
If you go to the site, you will will not see the widget title.
When using "Display using a custom template file", it does not save the widget title.