diff --git a/lib/Chunk.js b/lib/Chunk.js
index 728f9f0d326..26387f027fa 100644
--- a/lib/Chunk.js
+++ b/lib/Chunk.js
@@ -598,8 +598,12 @@ class Chunk {
 	 */
 	getAllInitialChunks() {
 		const chunks = new Set();
-		for (const group of this.groupsIterable) {
-			for (const c of group.chunks) chunks.add(c);
+		const queue = new Set(this.groupsIterable);
+		for (const group of queue) {
+			if (group.isInitial()) {
+				for (const c of group.chunks) chunks.add(c);
+				for (const g of group.childrenIterable) queue.add(g);
+			}
 		}
 		return chunks;
 	}