diff --git a/python/sglang/srt/managers/scheduler_pp_mixin.py b/python/sglang/srt/managers/scheduler_pp_mixin.py
index 350790413..baedd44d5 100644
--- a/python/sglang/srt/managers/scheduler_pp_mixin.py
+++ b/python/sglang/srt/managers/scheduler_pp_mixin.py
@@ -660,6 +660,13 @@ class SchedulerPPMixin:
                 start = time.perf_counter()
                 batch.prepare_for_extend()
 
+                # Resolve deferred H2D: prepare_for_extend now leaves input_ids=None
+                if batch.input_ids is None and batch.prefill_input_ids_cpu is not None:
+                    batch.input_ids = batch.prefill_input_ids_cpu.to(
+                        self.device, non_blocking=True
+                    )
+                    batch.prefill_input_ids_cpu = None
+
                 forward_batch = ForwardBatch.init_new(batch, model_runner)
                 set_is_extend_in_batch(batch.forward_mode.is_extend())