Compatibility with the Dyad 2 theme

As I thought: this feature of jetpack (https://jetpack.com/support/featured-content/) is not implemented in a way at dyad2 to show anything else than normal posts.
In inc/jetpack.php line 17 the function to pull posts for featured content is defined like this:

//Featured content
add_theme_support( 'featured-content' , array(
    'featured_content_filter' => 'dyad_2_get_banner_posts',
    'max_posts' => 6,
    'post_types' => array( 'post' ),
) );

according to jetpack’s feature page this should include recipes as well

add_theme_support( 'featured-content', array(
    'featured_content_filter' => 'dyad_2_get_banner_posts',
    'max_posts'  => 20,
    'post_types' => array( 'post', 'rpr_recipe' ),
) );

Manually editing the file might not be the best idea, as each update of the theme will break it. Maybe ask the developers of the theme to add an option to include other posts types as well. Or think about creating a child theme.

Finally: This is not a issue of RecipePress reloaded!

Please read the documentation. It’s of no help if you do things without understanding what is happening.

Just a little hint: You need to copy the file you want to change /overwrite to your child theme and edit it there.

Alright, that was my mistake.

Quick fix: Add the following line at public/class-rpr-public.php in line 231:

return $content;

The complete block of code then should look like this:

/* Only render specifically if we have a recipe */
        if ( get_post_type() == 'rpr_recipe' ) {
            remove_filter('get_the_excerpt', array( $this, 'get_recipe_excerpt' ), 10);
            $recipe_post = get_post();

            $content = $this->render_recipe_excerpt( $recipe_post );
            return $content;
            add_filter('get_the_excerpt', array( $this, 'get_recipe_excerpt' ), 10);
        } else {
            return $content;
        }

I will add this fix to the next release, but this might take some time.

Quite obvioulsy most themes (including the default theme TwentySeventeen, …) do not seem to be affected by this bug.

This is a feature and not a bug.

The ‘excerpt field’ in the editor is not the same as ‘the excerpt’.
The excerpt as displayed on the front page is a composition of several data (including categories, tags and other meta data) as defined by the layout files of RecipePress.
As some themes do not make use of the the_excerpt() function provided by wordpress but rather take the value aof the excerpt field directly from tha database, the plauginsaves the description into the excerpt field to provide at least some data in this case.

The austosave message seems to be a quite annoying yet harmless bug, as the saving of data still works.

No, this is currently not possible.