Fix on_since for smartstrip sockets (#529)

rytilahti · web-flow · commit af37e83db1aa · 2023-10-16T19:37:55.000+02:00
diff --git a/kasa/smartstrip.py b/kasa/smartstrip.py
@@ -360,7 +360,7 @@ def on_since(self) -> Optional[datetime]:
         info = self._get_child_info()
         on_time = info["on_time"]
 
-        return self.time - timedelta(seconds=on_time)
+        return datetime.now().replace(microsecond=0) - timedelta(seconds=on_time)
 
     @property  # type: ignore
     @requires_update
