Aye, it’s best if I adhere to policies – as I mentioned in my comment, the fix was painfully obvious updating the provided code to the following & then calling for set image sizes, even if I then had to first define the image sizes, resolved the issue:
// Some picture
$wp_customize->add_setting( 'some_setting',
array(
'default' => '',
'sanitize_callback' => 'esc_attr',
)
);
$wp_customize->add_section('some_section', array(
'title' => __('Some Picture', 'textdomain'),
'priority' => 10,
'sanitize_callback' => 'esc_attr',
));
$wp_customize->add_control( new WP_Customize_Media_Control( $wp_customize, 'some_setting', array(
'label' => __( 'Some Picture', 'textdomain' ),
'section' => 'title_tagline',
'height' => 250,
'width' => 250,
'flex-width' => false,
'flex-height' => false,
'settings' => 'some_setting',
'mime_type' => 'image',
'transport' => 'refresh'
) ) );