I found your post about the deep nesting check. I inserted the following into my functions.php and it seems to work :).
function your_theme_init() {
// Disable nesting check to allow inserted pages within inserted pages.
add_filter( 'insert_pages_apply_nesting_check', function ( $should_apply ) { return false; } );
}
add_action( 'init', 'your_theme_init' );
I should also mention the following:
I have a page, where I insert the tabs. In each tab, I insert another page. The structure looks like that:
– homepage
|- inserted page with tabs (working)
|- inserted page (not working)
|- inserted page without tabs (working)
