From 1b73b033a77bbe98a088f47722fa45afee48eafa Mon Sep 17 00:00:00 2001
From: Matt Westcott <matt@west.co.tt>
Date: Tue, 22 Mar 2022 22:07:33 +0000
Subject: [PATCH] Use cached_property for PanelGroup.BoundPanel.children

---
 wagtail/admin/panels.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/wagtail/admin/panels.py b/wagtail/admin/panels.py
index cc6e1662f2..89d743fa12 100644
--- a/wagtail/admin/panels.py
+++ b/wagtail/admin/panels.py
@@ -405,14 +405,16 @@ class PanelGroup(Panel):
         def __init__(self, panel, instance, request, form):
             super().__init__(panel=panel, instance=instance, request=request, form=form)
 
-            self.children = [
+        @cached_property
+        def children(self):
+            return [
                 child.get_bound_panel(
                     instance=self.instance, request=self.request, form=self.form
                 )
                 for child in self.panel.children
             ]
 
-        @property
+        @cached_property
         def visible_children(self):
             return [child for child in self.children if child.is_shown()]