Slider

No need to post here. This theme is abandoned.

I suggest you take an eye on Duena Revival which is still actively updated. Maybe it already fixed your problem. And if it doesn’t, just ask for it!

https://gitlab.com/maxlefou/DuenaRevivalTheme

Once you put Duena revival instead of old duena, go to customize, click on Slider (content) and ensure Show/Hide slide caption title is set as show