diff --git a/crates/iceberg/src/io/object_cache.rs b/crates/iceberg/src/io/object_cache.rs
index 88e2d0e2d5..ede637d394 100644
--- a/crates/iceberg/src/io/object_cache.rs
+++ b/crates/iceberg/src/io/object_cache.rs
@@ -141,7 +141,15 @@ impl ObjectCache {
             .entry_by_ref(&key)
             .or_try_insert_with(self.fetch_and_parse_manifest_list(snapshot, table_metadata))
             .await
-            .map_err(|err| Error::new(ErrorKind::Unexpected, err.as_ref().message()))?
+            .map_err(|err| {
+                Arc::try_unwrap(err).unwrap_or_else(|err| {
+                    Error::new(
+                        ErrorKind::Unexpected,
+                        "Failed to load manifest list in cache",
+                    )
+                    .with_source(err)
+                })
+            })?
             .into_value();
 
         match cache_entry {