Settings change automatically

Hi there,

On my website for cycling cafes (“wielercafes”) I use ACF for several fields. I work with Elementor.
One of them is the backgrounds of the heading on a news article.
Second example is for the loop of these articles.

Since this year, unfortunately, this is no longer as it should be.

The layout of the backgrounds in these two examples change automatically every few weeks. The functions that fall under ‘Background’, such as ‘size’ and ‘repeat’ change. As a result, the photos in the loops and in the news item are no longer displayed correctly. Below is an example of the loops.

This happens particularly in the messages from January 2022.

When I adjust the loops and templates slightly, reset and save again the problem is fixed. Yet this problem keeps recurring repeatedly for over 6 months.

Is there anything I can do about this?

Thanks in advanced.

Screenshot of example link

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