Render input issue when value has false value

I'm making an option for padding top of the page. I created an option, type = text but it always render empty string when I set padding to 0.

After digging into your code, I found that it's an issue in your code:

meta-box/inc/field.php file

render_attributes function

When we check if ( $value ) we can never render value "0". I hope you can modify it to

if ( $value!== false && $value !== null ) in the next version

Hope this helps