Can't remove the widget title!

I was reading an article of yours here at https://premium.wpmudev.org/blog/how-to-quickly-remove-wordpress-widget-titles/.

So I installed this plugin and surprised, with the Pledge Button when you add the <!> title still is displayed.

I tested it on other widget and there are no issues at all = title are gone.

Do you think the developer could fix that?

Roger