eduardonascimento

or a way to adapt the filter

add_action( 'wp', 'deactivate_rocket_lazyload_on_single' );
function deactivate_rocket_lazyload_on_single() {
    if ( is_single() ) {
        add_filter( 'do_rocket_lazyload', '__return_false' );
    }
}

to exclude ALL post types except one?

Solved.

Sorry, by distraction I left an open <div> inside the Contact Form. Stupid mistake.

Kind regards.