bpardee

I was having the same problem. It is definitely because of the upgrade from 4.4.2 to 4.5. It is caused by the element style on input[“number”].

To fix the problem permanently you have to edit the sydney/inc/customizer.php file and remove the style off of the input number controls.

Remove this line from the 15 input number control items

'style' => 'margin-bottom: 15px; padding: 10px;',

Here is the first one:

BEFORE

$wp_customize->add_control(
        'wrapper_top_padding',
        array(
            'label'         => __( 'Page wrapper - top padding', 'sydney' ),
            'section'       => 'sydney_general',
            'type'          => 'number',
            'description'   => __('Top padding for the page wrapper (the space between the header and the page title)', 'sydney'),
            'priority'      => 10,
            'input_attrs' => array(
                'min'   => 0,
                'max'   => 160,
                'step'  => 1,
                'style' => 'margin-bottom: 15px; padding: 10px;',
            ),
        )
    );

AFTER

$wp_customize->add_control(
        'wrapper_top_padding',
        array(
            'label'         => __( 'Page wrapper - top padding', 'sydney' ),
            'section'       => 'sydney_general',
            'type'          => 'number',
            'description'   => __('Top padding for the page wrapper (the space between the header and the page title)', 'sydney'),
            'priority'      => 10,
            'input_attrs' => array(
                'min'   => 0,
                'max'   => 160,
                'step'  => 1,

            ),
        )
    );