diff --git a/direct/core/src/main/java/cz/o2/proxima/direct/core/transaction/TransactionalOnlineAttributeWriter.java b/direct/core/src/main/java/cz/o2/proxima/direct/core/transaction/TransactionalOnlineAttributeWriter.java
index ceb18bb90..465059367 100644
--- a/direct/core/src/main/java/cz/o2/proxima/direct/core/transaction/TransactionalOnlineAttributeWriter.java
+++ b/direct/core/src/main/java/cz/o2/proxima/direct/core/transaction/TransactionalOnlineAttributeWriter.java
@@ -37,7 +37,6 @@
 import cz.o2.proxima.direct.core.OnlineAttributeWriter;
 import cz.o2.proxima.direct.core.transform.DirectElementWiseTransform;
 import cz.o2.proxima.internal.com.google.common.base.Preconditions;
-import cz.o2.proxima.internal.com.google.common.collect.Iterables;
 import java.net.URI;
 import java.util.ArrayList;
 import java.util.Collection;
@@ -247,9 +246,8 @@ public void commitWrite(List<StreamElement> outputs, CommitCallback callback)
       } catch (TransactionRejectedRuntimeException ex) {
         throw (TransactionRejectedException) ex.getCause();
       }
-      StreamElement toWrite = getSingleOrCommit(transformed);
-      OnlineAttributeWriter writer =
-          transformed.size() == 1 && !isGlobalTransaction ? delegate : commitDelegate;
+      StreamElement toWrite = getCommit(transformed);
+      OnlineAttributeWriter writer = commitDelegate;
       List<KeyAttribute> keyAttributes =
           transformed.stream().map(KeyAttributes::ofStreamElement).collect(Collectors.toList());
       boolean anyDisallowed = keyAttributes.stream().anyMatch(KeyAttribute::isWildcardQuery);
@@ -275,10 +273,12 @@ public void commitWrite(List<StreamElement> outputs, CommitCallback callback)
               rollback();
             }
             log.debug(
-                "Committed outputs {} (via {}) of transaction {}",
+                "Committed outputs {} (via {}) of transaction {}: ({}, {})",
                 transformed,
                 toWrite,
-                transactionId);
+                transactionId,
+                succ,
+                (Object) exc);
             callback.commit(succ, exc);
           };
       state = State.Flags.COMMITTED;
@@ -351,10 +351,7 @@ private void applyTransform(
       }
     }
 
-    private StreamElement getSingleOrCommit(Collection<StreamElement> outputs) {
-      if (outputs.size() == 1 && !isGlobalTransaction) {
-        return Iterables.getOnlyElement(outputs);
-      }
+    private StreamElement getCommit(Collection<StreamElement> outputs) {
       return manager
           .getCommitDesc()
           .upsert(transactionId, stamp, Commit.of(sequenceId, stamp, outputs));