diff --git a/packages/x6/src/graph/group-manager.ts b/packages/x6/src/graph/group-manager.ts
index 23bd138c3b3..b19fa437dfa 100644
--- a/packages/x6/src/graph/group-manager.ts
+++ b/packages/x6/src/graph/group-manager.ts
@@ -173,7 +173,7 @@ export class GroupManager extends BaseManager {
       for (let i = cells.length - 1; i >= 0; i -= 1) {
         let geo = this.graph.getCellGeometry(cells[i])
         if (geo != null) {
-          const children = this.graph.getChildren(cells[i])
+          const children = this.graph.getVisibleChildren(cells[i])
           if (children != null && children.length > 0) {
             const bounds = this.graph.getBoundingBoxFromGeometry(children, true)
             if (bounds != null && bounds.width > 0 && bounds.height > 0) {
diff --git a/packages/x6/src/graph/retrieval-accessor.ts b/packages/x6/src/graph/retrieval-accessor.ts
index 9f244daa2b4..a5c1106657b 100644
--- a/packages/x6/src/graph/retrieval-accessor.ts
+++ b/packages/x6/src/graph/retrieval-accessor.ts
@@ -92,21 +92,21 @@ export class RetrievalAccessor extends BaseGraph {
   /**
    * Returns the visible child nodes of the given parent.
    */
-  getChildNodes(parent: Cell) {
-    return this.getChildren(parent, true, false)
+  getVisibleChildNodes(parent: Cell) {
+    return this.getVisibleChildren(parent, true, false)
   }
 
   /**
    * Returns the visible child edges of the given parent.
    */
-  getChildEdges(parent: Cell) {
-    return this.getChildren(parent, false, true)
+  getVisibleChildEdges(parent: Cell) {
+    return this.getVisibleChildren(parent, false, true)
   }
 
   /**
    * Returns the visible child nodes or edges of the given parent.
    */
-  getChildren(
+  getVisibleChildren(
     parent: Cell = this.getDefaultParent(),
     includeNodes: boolean = false,
     includeEdges: boolean = false,
@@ -115,6 +115,22 @@ export class RetrievalAccessor extends BaseGraph {
     return cells.filter(cell => this.isCellVisible(cell))
   }
 
+  getChildNodes(parent: Cell) {
+    return this.getChildren(parent, true, false)
+  }
+
+  getChildEdges(parent: Cell) {
+    return this.getChildren(parent, false, true)
+  }
+
+  getChildren(
+    parent: Cell = this.getDefaultParent(),
+    includeNodes: boolean = false,
+    includeEdges: boolean = false,
+  ) {
+    return this.model.getChildren(parent, includeNodes, includeEdges)
+  }
+
   /**
    * Returns all visible edges connected to the given cell without loops.
    */
diff --git a/packages/x6/src/handler/node/preview.ts b/packages/x6/src/handler/node/preview.ts
index 7fec6b79a15..e27685b9253 100644
--- a/packages/x6/src/handler/node/preview.ts
+++ b/packages/x6/src/handler/node/preview.ts
@@ -179,7 +179,7 @@ export class Preview extends Disposable {
   }
 
   protected updateMinBounds() {
-    const children = this.graph.getChildren(this.state.cell)
+    const children = this.graph.getVisibleChildren(this.state.cell)
     if (children.length > 0) {
       this.minBounds = this.graph.view.getBounds(children)
       if (this.minBounds != null) {