Block fields unresponsive in converted reusable block

Problem

ACF block fields are not consistently initialized after converting a Reusable Block to a Regular Block. This issue does not always occur.
Since core block still seem to work, my guess was it is an ACF issue.

Example

Steps to reproduce

1. Insert a reusable block which includes ACF Block fields (Reusable block outline below)
2. Convert the reusable block to a Regular Block

Reusable Block JSON

{
  "__file": "wp_block",
  "title": "Person Listing",
  "content": "<!-- wp:group {\"backgroundColor\":\"blue-light\",\"textColor\":\"gray-dark\"} -->\n<div class=\"wp-block-group has-blue-light-background-color has-gray-dark-color has-text-color has-background\"><div class=\"wp-block-group__inner-container\"><!-- wp:heading -->\n<h2>Meet the faces of EDI</h2>\n<!-- /wp:heading -->\n\n<!-- wp:columns -->\n<div class=\"wp-block-columns\"><!-- wp:column -->\n<div class=\"wp-block-column\"><!-- wp:acf/person {\n    \"id\": \"block_5ebc6bf81299d\",\n    \"name\": \"acf\\/person\",\n    \"data\": {\n        \"person\": 899,\n        \"_person\": \"field_5ebc0df79263f\"\n    },\n    \"align\": \"center\",\n    \"mode\": \"edit\"\n} /--></div>\n<!-- /wp:column -->\n\n<!-- wp:column -->\n<div class=\"wp-block-column\"><!-- wp:acf/person {\n    \"id\": \"block_5ebc6bf81299e\",\n    \"name\": \"acf\\/person\",\n    \"data\": {\n        \"person\": 849,\n        \"_person\": \"field_5ebc0df79263f\"\n    },\n    \"align\": \"center\",\n    \"mode\": \"edit\"\n} /-->\n\n<!-- wp:paragraph -->\n<p></p>\n<!-- /wp:paragraph --></div>\n<!-- /wp:column --></div>\n<!-- /wp:columns --></div></div>\n<!-- /wp:group -->"
}

Block Outline

Person being the ACF Block

Similar Issue

#183

Start by reproducing the conversion using the supplied Reusable Block JSON and the ACF Person block outline. Compare field initialization before and after converting the reusable block to a regular block; done means the ACF fields consistently respond after conversion.