diff --git a/src/diffusers/pipelines/ltx2/latent_upsampler.py b/src/diffusers/pipelines/ltx2/latent_upsampler.py
index 7cb84b951a..4347bbf1ed 100644
--- a/src/diffusers/pipelines/ltx2/latent_upsampler.py
+++ b/src/diffusers/pipelines/ltx2/latent_upsampler.py
@@ -126,7 +126,10 @@ class BlurDownsample(torch.nn.Module):
             # dims == 3: apply per-frame on H,W
             b, c, f, _, _ = x.shape
             x = x.transpose(1, 2).flatten(0, 1)  # [B, C, F, H, W] --> [B * F, C, H, W]
-            x = self._apply_2d(x)
+
+            weight = self.kernel.expand(c, 1, self.kernel_size, self.kernel_size)  # depthwise
+            x = F.conv2d(x, weight=weight, bias=None, stride=self.stride, padding=self.kernel_size // 2, groups=c)
+
             h2, w2 = x.shape[-2:]
             x = x.unflatten(0, (b, f)).reshape(b, -1, f, h2, w2)  # [B * F, C, H, W] --> [B, C, F, H, W]
         return x