diff --git a/src/batch/src/task/hash_shuffle_channel.rs b/src/batch/src/task/hash_shuffle_channel.rs
index a143d61a4883c..74add0774a1cb 100644
--- a/src/batch/src/task/hash_shuffle_channel.rs
+++ b/src/batch/src/task/hash_shuffle_channel.rs
@@ -59,6 +59,7 @@ fn generate_hash_values(chunk: &DataChunk, hash_info: &HashInfo) -> BatchResult<
                 .map(|idx| *idx as usize)
                 .collect::<Vec<_>>(),
             hasher_builder,
+            // TODO(st1page): https://github.com/risingwavelabs/risingwave/issues/15705
             false,
         )
         .iter_mut()
diff --git a/src/common/src/hash/consistent_hash/vnode.rs b/src/common/src/hash/consistent_hash/vnode.rs
index e67aea75cbc1e..799d821806237 100644
--- a/src/common/src/hash/consistent_hash/vnode.rs
+++ b/src/common/src/hash/consistent_hash/vnode.rs
@@ -146,6 +146,7 @@ impl VirtualNode {
         }
 
         data_chunk
+            // TODO(st1page): https://github.com/risingwavelabs/risingwave/issues/15705
             .get_hash_values(keys, Crc32FastBuilder, false)
             .into_iter()
             .map(|hash| hash.into())