diff --git a/modules/sampling/ptd/__init__.py b/modules/sampling/ptd/__init__.py
index e2149f6c..be00b316 100644
--- a/modules/sampling/ptd/__init__.py
+++ b/modules/sampling/ptd/__init__.py
@@ -102,13 +102,16 @@ def _swap(controller):
         except Exception:      # noqa: BLE001 -- only the progress bar and previews are lost
             pass
         # Step-aware modules (SLA, momentum, velocity bias) read the schedule from here: give them the real one.
+        # On the device and dtype the sampler was given: ComfyUI's own schedule sits on the GPU, and a model that
+        # compares it with its call's sigma (H3's head bank, SLA) fails on a CPU copy.
+        grid = controller.grid.to(device=sigmas.device, dtype=sigmas.dtype)
         options = extra_args.get("model_options", {}).get("transformer_options")
         if options is not None:
-            options["sample_sigmas"] = controller.grid.float()
+            options["sample_sigmas"] = grid
         log.once("ptd:swap", log.INFO, "FunPack PTD",
                  f"sampling {controller.hops} hops from {controller.adapter.label}; the chosen sampler and steps "
                  f"({len(sigmas) - 1}) are not used")
-        return ptd.sample(guider, controller.grid.float(), extra_args, callback, noise, latent_image,
+        return ptd.sample(guider, grid, extra_args, callback, noise, latent_image,
                           denoise_mask, disable_pbar)
 
     return run
diff --git a/modules/sampling/ptd/tests/test_ptd.py b/modules/sampling/ptd/tests/test_ptd.py
index aadce67e..4fcb3bf8 100644
--- a/modules/sampling/ptd/tests/test_ptd.py
+++ b/modules/sampling/ptd/tests/test_ptd.py
@@ -330,3 +330,30 @@ def test_the_file_list_is_read_again_when_settings_open(ptd, folder, monkeypatch
     adapter = listed["ptd"]["settings"]["adapter"]
     assert "new.safetensors" in [o["value"] for o in adapter["options"]]
     assert adapter["default"] in [o["value"] for o in adapter["options"]]
+
+
+def test_the_hop_schedule_sits_where_the_sampler_was_given_its_own(ptd, folder, monkeypatch):
+    """On a GPU ComfyUI hands the sampler a CUDA schedule; the one PTD swaps in must be on the same device
+    (a CPU copy met the call's CUDA sigma: "Expected all tensors to be on the same device"). The meta device
+    stands in for CUDA here."""
+    import comfy.samplers
+    from comfy.patcher_extension import WrappersMP
+    base = _tiny.native_model()
+    _tiny.epfl_file(folder / "a.safetensors", base.get_model_object("diffusion_model"))
+    model = _clone(base)
+    _install(ptd, model, "a.safetensors")
+    given = {}
+    monkeypatch.setattr(comfy.samplers.KSAMPLER, "sample",
+                        lambda self, wrap, sigmas, extra_args, *a, **k: given.update(sigmas=sigmas) or "done")
+
+    class Guider:
+        cfg = 1.0
+        model_patcher = None
+
+    extra = {"model_options": {"transformer_options": {}}}
+    run = model.wrappers[WrappersMP.SAMPLER_SAMPLE]["funpack.ptd"][0]
+    sigmas = torch.linspace(1.0, 0.0, 21, device="meta")
+    assert run(None, Guider(), sigmas, extra, None, None, None, None, True) == "done"
+    assert given["sigmas"].device == sigmas.device and given["sigmas"].dtype == sigmas.dtype
+    seen = extra["model_options"]["transformer_options"]["sample_sigmas"]
+    assert seen.device == sigmas.device and len(seen) == 5