I don’t know probably some chrome bug, and yea it’s from WP itself. Just like you said it only happens when you use the WP_Customize_Image_Control class. And Im counting on that beer haha. By the way were both Paul’s, trippy.
Hey,
Came across the same issue and found an easy fix. Here is the code.
function fix_section_bug()
{
?>
<style type = "text/css">
.wp-full-overlay-sidebar .wp-full-overlay-sidebar-content{
z-index: 1;
}
</style>
<?php
}
add_action('customize_controls_print_styles', 'fix_section_bug');