Large sortable list not saving the correct order when changed

[Sitetools]

I have created a sortable list:

    $pb9 = new Fieldmanager_Group( array(
            'name' => 'model_package',
            'limit' => 0,
            'label' => 'Model Package',
            'collapsed' => true,
            'label_macro' => array( 'Package: %s', 'title' ),
            'sortable' => true,
            'add_more_label' => __( 'Add another package', 'title' ),
            'children' => array(
                    'heading' => new Fieldmanager_Checkbox( array('name' => 'heading',
                                                'label' => 'Package heading',
                                            ) ),
                    'title' => new Fieldmanager_Textfield( 'Attribute title' ),
                    'img' => new Fieldmanager_Media( 'Link image if needed' ),
                    'gl' => new Fieldmanager_Textfield( 'GL value' ),
                    'sport' => new Fieldmanager_Textfield( 'Sport value' ),
                    'limited' => new Fieldmanager_Textfield( 'Limited value' )
            ),
    ) );
    $pb9->add_meta_box( 'Model Package', array( 'models' ) );

I have done this many times, but this list is much longer than any other I have done before around 100 list items.
When I move an item to another position and save the post the moved item has saved in a different position, usually 1 below the position it was moved to.
I have removed any characters from the input fields that might be causing issues e.g. &,'() etc.

Can you think of anything I can try to resolve this issue?

[dlh01]

I can replicate this behavior, but, in my case, I'm not sure the cause was the length of the list.

In my testing, the name attribute of the checkbox's companion hidden input was not being renumbered after resorting group children, no matter how many children were in the group.

When the misnamed input was submitted, the resulting $_POST['model_package'] array was out of order (98, 100, 99...) and would be saved as such.

The unchanged hidden input seems like it could be a bug, although I might be overlooking something. While I don't know how generalizable the cause-and-effect is, if I remove the Fieldmanager_Checkbox, or if I change fm_renumber to $( this ).find( '.fm-element, .fm-item > input[type=hidden], .fm-incrementable' ), then seems resorting works as expected.

[Sitetools]

Thanks for that, I'll do some testing and let you know how I get on.
I love this plugin, you have allowed me to create intuitive pages and posts for clients.

Thank you for sharing your plugin.

[Sitetools]

Great stuff, I used the $( this ).find( '.fm-element, .fm-item > input[type=hidden], .fm-incrementable' ) to replace $( this ).find( '.fm-element, .fm-incrementable' )
Worked perfectly once I'd hard refreshed the page.

Thank you.

[dlh01]

I'm glad to hear it, although I wouldn't rely on that particular piece of code without (at least) more research into its effects on the rest of Fieldmanager, unit tests, and feedback from others. But, I hope it helps with identifying the issue, if in fact it's an FM issue, and finding a solution.

[amehta3000]

I'm seeing the same issue. Sorting is only working when I don't have a checkbox in the children array. I had to just comment out my checkbox and then the sortable started working again. It is obviously not desirable and seems like a bug. If there is another work around?

$pli => new \Fieldmanager_Group( 'Playlist Item', array(
	'limit'          => 0,
	'add_more_label' => 'Add Playlist Item',
	'sortable'       => true,
	'collapsible'    => true,
	'collapsed'      => true,
	'extra_elements' => 0,
	'label'          => 'Playlist Item',
	'children'       => array(
		// 'hide_video'    => new \Fieldmanager_Checkbox( 'Hide Video' , array(
		// 	'default_value' => 0
		// 	) 
		// ),	
		'title'        => new \Fieldmanager_Textfield( 'Title' ),
		'description' => new \Fieldmanager_TextArea( 'Description', array(
				'attributes' => array(
					'rows' => 3,
					'cols' => 50,
					),
			)
		),
		'mediaURL'         => new \Fieldmanager_Link( 'Media URL', array(
			'description' 	=> 'Enter URL to m3u8 file'
			) ),
		'thumbnail'       => new \Fieldmanager_Media( 'Thumbnail', array(
			'description' 	=> 'Thumbnail should be 16:9 aspect ratio for best fit.'
			) ),
	)
) )