diff --git a/includes/classes/DistributorPost.php b/includes/classes/DistributorPost.php
index 17d1d5eb3..fef6d0c18 100644
--- a/includes/classes/DistributorPost.php
+++ b/includes/classes/DistributorPost.php
@@ -748,7 +748,11 @@ protected function parse_blocks_for_attachment_id( $block ) {
 		}
 
 		if ( in_array( $block['blockName'], $block_names, true ) ) {
-			$media[] = $block['attrs'][ $media_blocks[ $block['blockName'] ] ];
+			$attribute_key = $media_blocks[ $block['blockName'] ];
+
+			if ( isset( $block['attrs'][ $attribute_key ] ) ) {
+				$media[] = $block['attrs'][ $attribute_key ];
+			}
 		}
 
 		return $media;