Header Image on the event detail pages is gone since last plugin-update

Hallo,
i recognize a problem with the featured image of every event. I think this is since the last plugin-update.

Before, the featured image was automatically shown as the big header-background-image like it is defined from the template.

But now, the header-background-image is empty and the featured image is shown as a very large image in the content-area on every event-detail-page.

The header-background-image is always the featured image on this website and it is only gone on the event-detail-pages now.

This website uses a twentyseventeen-childtheme with Elementor.

Ich hope you can help me along with this and give me a hint to solve this.

Thanks a lot in advance.