Hi,
Not sure about what’s wrong but I already have this issue ( When get post object inside a post query and display data). I solve it by register each post ID and get data with the ID ( I think WP is a bit confused =D) …
Try to save the current query post ID :
...
<?php while($custom_query01->have_posts()) : $custom_query01->the_post(); ?>
<?php $query_id = get_the_ID(); // THE CURRENT POST OF QUERY ID ?>
...
Do the same for the object you get :
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if( $post_object01 ):
$object_id = $post_object01->ID; // THE OBJECT ID
...
And display all your data with echo and “get” like that :
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<?php echo get_the_title($object_id); // USE THE ID ?>
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<a href="<?php echo get_the_permalink($query_id); ?>" class="btn btn-warning">Daten & Preise</a>
...
