I've experienced this a few times in the past... even on paid templates.
Each time I create/copy a new slide in a slider, my background class and contents don't appear. Instead they're covered up by some default style.
I've tried everything I can think of to get this working, but have had zero luck.
Below is my original slide – flexbox, fixed background image, headings within a container and so on...
I've copied this slide within the navigator and neither the background nor the contents (text) is showing. Even despite making drastic style changes, closing windows and even logging out and back in.
Can anyone point me in the right direction here... Link below: