In reply to Marcus Tibesar.

Thanks for all the positive feedback! I'm glad to hear others have found the plugin helpful. :)

In regards to the shortcode conversion issue, the plugin relies on the core Gutenberg block conversion functionality. Meaning, the plugin doesn't actually process the conversion, Gutenberg does. The Bulk Block Converter plugin simply makes it possible to convert multiple posts and pages at once from a single interface. As a result, the issue is with the way Gutenberg handles the conversion.

The same issue occurs without the plugin installed, when navigating to a page that has shortcodes contained within a "Classic" block, and then choosing the option to convert to blocks.

If the issue is a concern, opening a support ticket with Gutenberg and/or WordPress might be the best course of action, https://wordpress.org/support/plugin/gutenberg/

Thanks!