diff --git a/mooncake-transfer-engine/src/transfer_engine_impl.cpp b/mooncake-transfer-engine/src/transfer_engine_impl.cpp
index f5aeb00b9b..4d7fa47386 100644
--- a/mooncake-transfer-engine/src/transfer_engine_impl.cpp
+++ b/mooncake-transfer-engine/src/transfer_engine_impl.cpp
@@ -616,10 +616,14 @@ int TransferEngineImpl::registerLocalMemory(void* addr, size_t length,
 
 int TransferEngineImpl::unregisterLocalMemory(void* addr,
                                               bool update_metadata) {
+    // Best-effort: try every transport so one failure can't leave the region
+    // registered on the others; mirrors unregisterLocalMemoryBatch (#2869).
+    int first_error = 0;
     for (auto& transport : multi_transports_->listTransports()) {
         int ret = transport->unregisterLocalMemory(addr, update_metadata);
-        if (ret) return ret;
+        if (ret && !first_error) first_error = ret;
     }
+    if (first_error) return first_error;
 
     std::unique_lock<std::shared_mutex> lock(mutex_);
     eraseMemoryRegionLocked(addr);