[BugFix] Fix incorrect hidden_states_tensor in pd disaggregation + eagle (#9976)

python/sglang/srt/disaggregation/prefill.py

@@ -421,6 +421,11 @@ class SchedulerDisaggregationPrefillMixin:
                     last_hidden_index = (
                         hidden_state_offset + extend_input_len_per_req[i] - 1
                     )
+                    if self.spec_algorithm.is_eagle3():
+                        req.hidden_states_tensor = (
+                            batch.spec_info.hidden_states[i].cpu().clone()
+                        )
+                    else:
                         req.hidden_states_tensor = (
                             logits_output.hidden_states[last_hidden_index].cpu().clone()
                         )