Well, I have a specific problem.

Everything looks promising while building a new Chart, until I'm done and hit the Publish button. That's supposed to then result in a Shortcode, in a box.

But when I Publish, instead of a shortcode, a PHP-string appears in the box, thusly:

[?= esc_attr(get_post_meta($object-]ID,'wpchartgenerator_shortcode_result',true)); ?]

(Angle-brackets are replaced with their respective square counterparts.)

And the Legend-tokens and Data-values are each changed to:

[?= esc_attr($value[0]); ?],
and
[?= esc_attr($value[1]); ?], respectively.

I'm then unable to recover my editing, and when I follow a link to the offered new Post, it returns a File Not Found error.