Views shortcode with long slugs

Hi,
I started using view shortcode and noticed that wrong data is displayed. I looked into views_shortcode function and there is this line
$link_uri = substr( $url_data['path'] . ( isset( $url_data['query'] ) ? ( '?' . $url_data['query'] ) : '' ), -20 );
Why substr is used here? I have much longer slugs than 20 and endings overlap with other links.

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