diff --git a/homeassistant/components/zha/core/store.py b/homeassistant/components/zha/core/store.py
index c82f05303a5..e58dcd46dba 100644
--- a/homeassistant/components/zha/core/store.py
+++ b/homeassistant/components/zha/core/store.py
@@ -5,7 +5,7 @@ from collections import OrderedDict
 from collections.abc import MutableMapping
 import datetime
 import time
-from typing import TYPE_CHECKING, cast
+from typing import TYPE_CHECKING, Any, cast
 
 import attr
 
@@ -45,10 +45,11 @@ class ZhaStorage:
     @callback
     def async_create_device(self, device: ZHADevice) -> ZhaDeviceEntry:
         """Create a new ZhaDeviceEntry."""
+        ieee_str: str = str(device.ieee)
         device_entry: ZhaDeviceEntry = ZhaDeviceEntry(
-            name=device.name, ieee=str(device.ieee), last_seen=device.last_seen
+            name=device.name, ieee=ieee_str, last_seen=device.last_seen
         )
-        self.devices[device_entry.ieee] = device_entry
+        self.devices[ieee_str] = device_entry
         self.async_schedule_save()
         return device_entry
 
@@ -81,8 +82,8 @@ class ZhaStorage:
         ieee_str: str = str(device.ieee)
         old = self.devices[ieee_str]
 
-        if old is not None and device.last_seen is None:
-            return
+        if device.last_seen is None:
+            return old
 
         changes = {}
         changes["last_seen"] = device.last_seen
@@ -93,7 +94,7 @@ class ZhaStorage:
 
     async def async_load(self) -> None:
         """Load the registry of zha device entries."""
-        data = await self._store.async_load()
+        data = cast(dict[str, Any], await self._store.async_load())
 
         devices: OrderedDict[str, ZhaDeviceEntry] = OrderedDict()
 
diff --git a/mypy.ini b/mypy.ini
index b5c56d71ff9..0f8c8fc0b61 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -3001,6 +3001,3 @@ ignore_errors = true
 
 [mypy-homeassistant.components.zha.core.registries]
 ignore_errors = true
-
-[mypy-homeassistant.components.zha.core.store]
-ignore_errors = true
diff --git a/script/hassfest/mypy_config.py b/script/hassfest/mypy_config.py
index 453eade7b2d..0fd62d49ae2 100644
--- a/script/hassfest/mypy_config.py
+++ b/script/hassfest/mypy_config.py
@@ -146,7 +146,6 @@ IGNORED_MODULES: Final[list[str]] = [
     "homeassistant.components.xiaomi_miio.switch",
     "homeassistant.components.zha.core.discovery",
     "homeassistant.components.zha.core.registries",
-    "homeassistant.components.zha.core.store",
 ]
 
 # Component modules which should set no_implicit_reexport = true.