Custom Block w/Post Meta Throws Error when Saving

Hi there,

I have built a custom block using post meta that, when updated, seems to conflict with your plugin. I register the custom block, and in its JS file I reference the post meta data as attributes, which I update using a text control in the sidebar. If I update any of the properties that map to my custom post meta, your plugin throws an error (TypeError: Cannot read property ‘find’ of undefined) at line 241 of utils.js and the post fails to save. The undefined variable in this context is meta.sgf_els_headings. Any chance you have run into this before? Any help would be greatly appreciated.

Thanks!