diff --git a/python/sglang/srt/mem_cache/hi_mamba_radix_cache.py b/python/sglang/srt/mem_cache/hi_mamba_radix_cache.py
index fafc6d246..a08b2a33c 100644
--- a/python/sglang/srt/mem_cache/hi_mamba_radix_cache.py
+++ b/python/sglang/srt/mem_cache/hi_mamba_radix_cache.py
@@ -296,7 +296,7 @@ class HiMambaRadixCache(MambaRadixCache):
                 extra_pools=extra_pools,
             )
         if host_indices is not None:
-            node.host_value = host_indices
+            node.host_value = host_indices.clone()
             if extra_pools is not None:
                 self.mamba_backup_commit(node, extra_pools)
             assert len(node.host_value) > 0
@@ -2044,7 +2044,7 @@ class HiMambaRadixCache(MambaRadixCache):
             return
         host_indices = transfers[0].host_indices
         if node.mamba_host_value is None and host_indices is not None:
-            node.mamba_host_value = host_indices
+            node.mamba_host_value = host_indices.clone()
             self.mamba_host_lru_list.insert_mru(node)
 
     def mamba_archive_transfers(self, node: TreeNode) -> Optional[list[PoolTransfer]]:
diff --git a/python/sglang/srt/mem_cache/hiradix_cache.py b/python/sglang/srt/mem_cache/hiradix_cache.py
index c72556564..3c1e97daa 100644
--- a/python/sglang/srt/mem_cache/hiradix_cache.py
+++ b/python/sglang/srt/mem_cache/hiradix_cache.py
@@ -619,7 +619,7 @@ class HiRadixCache(RadixCache):
                 node_id=node.id,
             )
         if host_indices is not None:
-            node.host_value = host_indices
+            node.host_value = host_indices.clone()
             assert len(node.host_value) > 0
             self.ongoing_write_through[node.id] = node
             if not write_back: