From 0089af07abeb7b6949f7d99c9037e2ce4002dfe2 Mon Sep 17 00:00:00 2001
From: AnnMarueW <amward@fastmail.com>
Date: Fri, 7 Nov 2025 14:59:25 -0800
Subject: [PATCH] Clear child layout hashes when children prop changes.

---
 dash/dash-renderer/src/reducers/reducer.js | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/dash/dash-renderer/src/reducers/reducer.js b/dash/dash-renderer/src/reducers/reducer.js
index 56d2c82ad2..fc75ee2d81 100644
--- a/dash/dash-renderer/src/reducers/reducer.js
+++ b/dash/dash-renderer/src/reducers/reducer.js
@@ -1,4 +1,13 @@
-import {forEach, includes, isEmpty, keys, path, assoc, pathOr} from 'ramda';
+import {
+    forEach,
+    includes,
+    isEmpty,
+    keys,
+    path,
+    assoc,
+    pathOr,
+    pickBy
+} from 'ramda';
 import {combineReducers} from 'redux';
 
 import {getCallbacksByInput} from '../actions/dependencies_ts';
@@ -49,6 +58,14 @@ const layoutHashes = (state = {}, action) => {
             },
             state
         );
+
+        if ('children' in action.payload.props) {
+            // clear all child paths hashes
+            const childrenPath = stringifyPath(
+                actionPath.concat(['props', 'children'])
+            );
+            state = pickBy((_, key) => !key.startsWith(childrenPath), state);
+        }
     }
     return state;
 };