Site editor: Subtitle block error when used in WooCommerce collection query loop

Hello, could you test the block provided by the plugin in the site editor environment?
I’m getting a notice:

The "kia-subtitle" plugin has encountered an error and cannot be rendered.

Particularly, it happens within WooCommerce product catalog template where I try to display products with subtitles.
It is rendered on the front end but not in the editor.
On the other hand, it works well in singular templates editing.

Thank you!