Contain Background image wrong

I did, the only cause I can think of is cache.

Can you try choose Inline Embedding for the CSS Print Method in Settings > GenerateBlocks.

Not possible, since the site is live now.

If it doesn't work, can you start a staging site then?

cache is deaktivated.
tried embedding, but not solving the problem.
no possibility to setup a staging.
will no edit all the images manually, since site is online now and has to work properly.
i think i found a bug in your theme guys.

It's working properly now after all the cache is flushed:
https://www.screencast.com/t/J0oAcA4I46

Let me know if I miss anything.