Fix MiniMax-H3 Cache-DiT BCG warning (#34848)

python/sglang/multimodal_gen/runtime/pipelines_core/stages/model_specific_stages/minimax_h3/stages/denoising.py

@@ -413,6 +413,11 @@ class MiniMaxH3DenoisingStage(DenoisingStage):
         current_mode = getattr(self, "_minimax_h3_cache_mode", None)
         self._minimax_h3_quality = quality
 
+        if self.server_args.enable_breakable_cuda_graph:
+            if desired_mode is not None:
+                super()._maybe_enable_cache_dit(num_inference_steps, batch)
+            return
+
         # H3 is monolithic-only, and the scheduler executes one worker batch at
         # a time. Combined with `quality` in the dynamic-batch signature, this
         # makes the process-wide hook transition safe at this batch boundary.