diff --git a/gateway/run.py b/gateway/run.py
index 59dd890f8c9..741f2a235ad 100644
--- a/gateway/run.py
+++ b/gateway/run.py
@@ -14802,6 +14802,9 @@ class GatewayRunner(GatewayAuthorizationMixin, GatewayKanbanWatchersMixin, Gatew
                                 except KeyError:
                                     pass
                             self._init_cached_agent_for_turn(agent, _interrupt_depth)
+                            # Refresh agent max_iterations from current config
+                            # (cached agent may have been created with old config)
+                            agent.max_iterations = max_iterations
                             logger.debug("Reusing cached agent for session %s", session_key)
 
             if agent is None: