diff --git a/python/sglang/srt/observability/scheduler_metrics_mixin.py b/python/sglang/srt/observability/scheduler_metrics_mixin.py
index 7bdcb4cda..170753aa2 100644
--- a/python/sglang/srt/observability/scheduler_metrics_mixin.py
+++ b/python/sglang/srt/observability/scheduler_metrics_mixin.py
@@ -247,7 +247,10 @@ class SchedulerMetricsMixin:
         else:
             msg += f"input throughput (token/s): {self.last_input_throughput:.2f}, "
 
-        if self.server_args.language_only:
+        if (
+            self.server_args.language_only
+            and self.server_args.encoder_transfer_backend == "zmq_to_scheduler"
+        ):
             msg += f"waiting-image-req: {len(self.mm_receiver.waiting_list)}, "
         graph_backend = defaultdict(
             lambda: "cuda graph",
@@ -418,7 +421,10 @@ class SchedulerMetricsMixin:
             msg += f"#transfer-req: {len(self.disagg_decode_transfer_queue.queue)}, "
             msg += f"#retracted-req: {len(self.disagg_decode_prealloc_queue.retracted_queue)}, "
 
-        if self.server_args.language_only:
+        if (
+            self.server_args.language_only
+            and self.server_args.encoder_transfer_backend == "zmq_to_scheduler"
+        ):
             msg += f"waiting-image-req: {len(self.mm_receiver.waiting_list)}, "
 
         graph_backend = defaultdict(