diff --git a/packages/block-library/src/image/deprecated.js b/packages/block-library/src/image/deprecated.js
index 4205da8e117b91..0365ddcfff5d17 100644
--- a/packages/block-library/src/image/deprecated.js
+++ b/packages/block-library/src/image/deprecated.js
@@ -1047,6 +1047,14 @@ const v8 = {
 		},
 	},
 	migrate( { width, height, ...attributes } ) {
+		// We need to perform a check here because in cases
+		// where attributes are added dynamically to blocks,
+		// block invalidation overrides the isEligible() method
+		// and forces the migration to run, so it's not guaranteed
+		// that `behaviors` or `behaviors.lightbox` will be defined.
+		if ( ! attributes.behaviors?.lightbox ) {
+			return attributes;
+		}
 		const {
 			behaviors: {
 				lightbox: { enabled },