Icon-Box-Section and Advanced Text Block not showing

Hey guys,

I desperately need help with the following problem:

On the homepage, while workin in the elementor-mode, everything is fine and all sections are showing up. After I save the content and load the site regularly (I tried several browsers), the Icon-Box-section (under the Play-Button) and any heading (displayed with the Advanced Text Block function) are not showing.

Here are a two pictures how it should look like:

https://bvc99.sleepyfeather.de/wp-content/uploads/2020/07/Bildschirmfoto-2020-07-30-um-17.15.34.png
https://bvc99.sleepyfeather.de/wp-content/uploads/2020/07/Bildschirmfoto-2020-07-30-um-17.15.47.png

And this is how it looks like:

https://bvc99.sleepyfeather.de/wp-content/uploads/2020/07/Bildschirmfoto-2020-07-30-um-17.16.11.png
https://bvc99.sleepyfeather.de/wp-content/uploads/2020/07/Bildschirmfoto-2020-07-30-um-17.16.18.png

I hope someone could help me out. I already deactivated all plugins and tried again without an effect.

Thanks in advance!

The page I need help with: [log in to see the link]