From 21fbbc5fb9477704be8b1ec8293d2a729f7a0072 Mon Sep 17 00:00:00 2001
From: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
Date: Thu, 26 Sep 2024 12:34:27 +1200
Subject: [PATCH] [config_validation] Fix bug with extras on schemas (#7497)

---
 esphome/voluptuous_schema.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/esphome/voluptuous_schema.py b/esphome/voluptuous_schema.py
index 7f1573b443ae..15f9206f21ad 100644
--- a/esphome/voluptuous_schema.py
+++ b/esphome/voluptuous_schema.py
@@ -226,4 +226,6 @@ def extend(self, *schemas, **kwargs):
         if isinstance(schema, vol.Schema):
             schema = schema.schema
         ret = super().extend(schema, extra=extra)
-        return _Schema(ret.schema, extra=ret.extra, extra_schemas=self._extra_schemas)
+        return _Schema(
+            ret.schema, extra=ret.extra, extra_schemas=self._extra_schemas.copy()
+        )