diff --git a/ydb/core/persqueue/partition.cpp b/ydb/core/persqueue/partition.cpp
index 4eb2093bf279..70aafdc97a13 100644
--- a/ydb/core/persqueue/partition.cpp
+++ b/ydb/core/persqueue/partition.cpp
@@ -82,7 +82,7 @@ TString TPartition::LogPrefix() const {
     } else {
         state = "Unknown";
     }
-    return TStringBuilder() << "[PQ: " << TabletID << ", Partition:" << Partition << ", State:" << state << "] ";
+    return TStringBuilder() << "[PQ: " << TabletID << ", Partition: " << Partition << ", State: " << state << "] ";
 }
 
 bool TPartition::IsActive() const {
@@ -2134,6 +2134,8 @@ bool TPartition::BeginTransaction(const TEvPQ::TEvProposePartitionConfig& event)
 
 void TPartition::CommitWriteOperations(TTransaction& t)
 {
+    PQ_LOG_D("TPartition::CommitWriteOperations TxId: " << t.GetTxId());
+
     Y_ABORT_UNLESS(PersistRequest);
     Y_ABORT_UNLESS(!PartitionedBlob.IsInited());
 
@@ -2151,6 +2153,10 @@ void TPartition::CommitWriteOperations(TTransaction& t)
         HaveWriteMsg = true;
     }
 
+    PQ_LOG_D("t.WriteInfo->BodyKeys.size=" << t.WriteInfo->BodyKeys.size() <<
+             ", t.WriteInfo->BlobsFromHead.size=" << t.WriteInfo->BlobsFromHead.size());
+    PQ_LOG_D("Head=" << Head << ", NewHead=" << NewHead);
+
     if (!t.WriteInfo->BodyKeys.empty()) {
         PartitionedBlob = TPartitionedBlob(Partition,
                                            NewHead.Offset,
@@ -2165,6 +2171,7 @@ void TPartition::CommitWriteOperations(TTransaction& t)
                                            MaxBlobSize);
 
         for (auto& k : t.WriteInfo->BodyKeys) {
+            PQ_LOG_D("add key " << k.Key.ToString());
             auto write = PartitionedBlob.Add(k.Key, k.Size);
             if (write && !write->Value.empty()) {
                 AddCmdWrite(write, PersistRequest.Get(), ctx);
@@ -2173,18 +2180,17 @@ void TPartition::CommitWriteOperations(TTransaction& t)
             }
         }
 
-    }
 
-    if (const auto& formedBlobs = PartitionedBlob.GetFormedBlobs(); !formedBlobs.empty()) {
-        ui32 curWrites = RenameTmpCmdWrites(PersistRequest.Get());
-        RenameFormedBlobs(formedBlobs,
-                          *Parameters,
-                          curWrites,
-                          PersistRequest.Get(),
-                          ctx);
-    }
+        PQ_LOG_D("PartitionedBlob.GetFormedBlobs().size=" << PartitionedBlob.GetFormedBlobs().size());
+        if (const auto& formedBlobs = PartitionedBlob.GetFormedBlobs(); !formedBlobs.empty()) {
+            ui32 curWrites = RenameTmpCmdWrites(PersistRequest.Get());
+            RenameFormedBlobs(formedBlobs,
+                              *Parameters,
+                              curWrites,
+                              PersistRequest.Get(),
+                              ctx);
+        }
 
-    if (!t.WriteInfo->BodyKeys.empty()) {
         const auto& last = t.WriteInfo->BodyKeys.back();
 
         NewHead.Offset += (last.Key.GetOffset() + last.Key.GetCount());
diff --git a/ydb/core/persqueue/partition_id.h b/ydb/core/persqueue/partition_id.h
index 5ef5c4fa75e2..0c1dbb8d3afd 100644
--- a/ydb/core/persqueue/partition_id.h
+++ b/ydb/core/persqueue/partition_id.h
@@ -7,6 +7,7 @@
 #include <util/system/types.h>
 #include <util/digest/multi.h>
 #include <util/str_stl.h>
+#include <util/string/builder.h>
 
 #include <functional>
 
@@ -51,6 +52,13 @@ class TPartitionId {
         }
     }
 
+    TString ToString() const
+    {
+        TStringBuilder s;
+        s << *this;
+        return s;
+    }
+
     bool IsSupportivePartition() const
     {
         return WriteId.Defined();
diff --git a/ydb/core/persqueue/partition_write.cpp b/ydb/core/persqueue/partition_write.cpp
index a7b7af8c51ce..a9a592a794eb 100644
--- a/ydb/core/persqueue/partition_write.cpp
+++ b/ydb/core/persqueue/partition_write.cpp
@@ -1064,16 +1064,16 @@ void TPartition::RenameFormedBlobs(const std::deque<TPartitionedBlob::TRenameFor
         }
         if (!DataKeysBody.empty() && CompactedKeys.empty()) {
             Y_ABORT_UNLESS(DataKeysBody.back().Key.GetOffset() + DataKeysBody.back().Key.GetCount() <= x.NewKey.GetOffset(),
+                           "PQ: %" PRIu64 ", Partition: %s, "
                            "LAST KEY %s, HeadOffset %lu, NEWKEY %s",
+                           TabletID, Partition.ToString().c_str(),
                            DataKeysBody.back().Key.ToString().c_str(),
                            Head.Offset,
                            x.NewKey.ToString().c_str());
         }
-        LOG_DEBUG_S(
-                    ctx, NKikimrServices::PERSQUEUE,
-                    "writing blob: topic '" << TopicName() << "' partition " << Partition
-                    << " " << x.OldKey.ToString() << " size " << x.Size << " WTime " << ctx.Now().MilliSeconds()
-                   );
+        PQ_LOG_D("writing blob: topic '" << TopicName() << "' partition " << Partition <<
+                 " old key " << x.OldKey.ToString() << " new key " << x.NewKey.ToString() <<
+                 " size " << x.Size << " WTime " << ctx.Now().MilliSeconds());
 
         CompactedKeys.emplace_back(x.NewKey, x.Size);
     }
diff --git a/ydb/core/persqueue/pq_impl.cpp b/ydb/core/persqueue/pq_impl.cpp
index c10606ecacba..09532d2c85a3 100644
--- a/ydb/core/persqueue/pq_impl.cpp
+++ b/ydb/core/persqueue/pq_impl.cpp
@@ -4667,6 +4667,8 @@ void TPersQueue::TryStartTransaction(const TActorContext& ctx)
     Y_ABORT_UNLESS(next);
 
     CheckTxState(ctx, *next);
+
+    TryWriteTxs(ctx);
 }
 
 void TPersQueue::OnInitComplete(const TActorContext& ctx)
diff --git a/ydb/core/tx/datashard/datashard_ut_change_exchange.cpp b/ydb/core/tx/datashard/datashard_ut_change_exchange.cpp
index 7664fff85a8d..d0dfc48d38fc 100644
--- a/ydb/core/tx/datashard/datashard_ut_change_exchange.cpp
+++ b/ydb/core/tx/datashard/datashard_ut_change_exchange.cpp
@@ -1246,6 +1246,8 @@ Y_UNIT_TEST_SUITE(Cdc) {
 
             // get records
             {
+                WaitForDataRecords(client, shardIt);
+
                 auto res = client.GetRecords(shardIt).ExtractValueSync();
                 UNIT_ASSERT_C(res.IsSuccess(), res.GetIssues().ToString());
                 UNIT_ASSERT_VALUES_EQUAL(res.GetResult().records().size(), records.size());
@@ -1267,6 +1269,19 @@ Y_UNIT_TEST_SUITE(Cdc) {
             }
         }
 
+        static void WaitForDataRecords(TDataStreamsClient& client, const TString& shardIt) {
+            int n = 0;
+            for (; n < 100; ++n) {
+                auto res = client.GetRecords(shardIt).ExtractValueSync();
+                UNIT_ASSERT_C(res.IsSuccess(), res.GetIssues().ToString());
+                if (res.GetResult().records().size()) {
+                    break;
+                }
+                Sleep(TDuration::MilliSeconds(100));
+            }
+            UNIT_ASSERT_VALUES_UNEQUAL(n, 100);
+        }
+
         static void Write(const TShardedTableOptions& tableDesc, const TCdcStream& streamDesc) {
             TTestYdsEnv env(tableDesc, streamDesc);
 
diff --git a/ydb/core/tx/schemeshard/ut_base/ut_base.cpp b/ydb/core/tx/schemeshard/ut_base/ut_base.cpp
index 0e1c77e0c1b5..da965c1fa59b 100644
--- a/ydb/core/tx/schemeshard/ut_base/ut_base.cpp
+++ b/ydb/core/tx/schemeshard/ut_base/ut_base.cpp
@@ -6343,6 +6343,7 @@ Y_UNIT_TEST_SUITE(TSchemeShardTest) {
                         "PartitionPerTablet: 10 "
                         "PQTabletConfig: {PartitionConfig { LifetimeSeconds : 10}}"
                         );
+        env.TestWaitNotification(runtime, txId);
 
         TestDescribeResult(DescribePath(runtime, "/MyRoot/DirA/PQGroup_1", true),
                            {NLs::CheckPartCount("PQGroup_1", 100, 10, 10, 100),
@@ -6865,7 +6866,7 @@ Y_UNIT_TEST_SUITE(TSchemeShardTest) {
         AsyncForceDropUnsafe(runtime, ++txId, pVer.PathId.LocalPathId);
 
         TestModificationResult(runtime, txId-2, NKikimrScheme::StatusAccepted);
-        TestModificationResult(runtime, txId-1, NKikimrScheme::StatusAccepted);
+        TestModificationResults(runtime, txId-1, {NKikimrScheme::StatusAccepted, NKikimrScheme::StatusMultipleModifications});
         TestModificationResult(runtime, txId, NKikimrScheme::StatusAccepted);
 
         TActorId sender = runtime.AllocateEdgeActor();
diff --git a/ydb/public/sdk/cpp/client/ydb_topic/ut/topic_to_table_ut.cpp b/ydb/public/sdk/cpp/client/ydb_topic/ut/topic_to_table_ut.cpp
index 0c91435696c7..126a84484983 100644
--- a/ydb/public/sdk/cpp/client/ydb_topic/ut/topic_to_table_ut.cpp
+++ b/ydb/public/sdk/cpp/client/ydb_topic/ut/topic_to_table_ut.cpp
@@ -146,6 +146,8 @@ class TFixture : public NUnitTest::TBaseFixture {
 
     void TestTxWithBigBlobs(const TTestTxWithBigBlobsParams& params);
 
+    void WriteMessagesInTx(size_t big, size_t small);
+
     const TDriver& GetDriver() const;
 
     void CheckTabletKeys(const TString& topicName);
@@ -1595,21 +1597,22 @@ void TFixture::TestTxWithBigBlobs(const TTestTxWithBigBlobsParams& params)
 
     for (size_t i = 0; i < params.OldHeadCount; ++i) {
         WriteToTopic("topic_A", TEST_MESSAGE_GROUP_ID, TString(100'000, 'x'));
+        WaitForAcks("topic_A", TEST_MESSAGE_GROUP_ID);
         ++oldHeadMsgCount;
     }
 
     for (size_t i = 0; i < params.BigBlobsCount; ++i) {
-        WriteToTopic("topic_A", TEST_MESSAGE_GROUP_ID, TString(7'900'000, 'x'), &tx);
+        WriteToTopic("topic_A", TEST_MESSAGE_GROUP_ID, TString(7'000'000, 'x'), &tx);
+        WaitForAcks("topic_A", TEST_MESSAGE_GROUP_ID);
         ++bigBlobMsgCount;
     }
 
     for (size_t i = 0; i < params.NewHeadCount; ++i) {
         WriteToTopic("topic_A", TEST_MESSAGE_GROUP_ID, TString(100'000, 'x'), &tx);
+        WaitForAcks("topic_A", TEST_MESSAGE_GROUP_ID);
         ++newHeadMsgCount;
     }
 
-    WaitForAcks("topic_A", TEST_MESSAGE_GROUP_ID);
-
     if (params.RestartMode == ERestartBeforeCommit) {
         RestartPQTablet("topic_A", 0);
     }
@@ -1638,7 +1641,7 @@ void TFixture::TestTxWithBigBlobs(const TTestTxWithBigBlobsParams& params)
     start += oldHeadMsgCount;
 
     for (size_t i = 0; i < bigBlobMsgCount; ++i) {
-        UNIT_ASSERT_VALUES_EQUAL(messages[start + i].size(), 7'900'000);
+        UNIT_ASSERT_VALUES_EQUAL(messages[start + i].size(), 7'000'000);
     }
     start += bigBlobMsgCount;
 
@@ -1903,6 +1906,90 @@ Y_UNIT_TEST_F(WriteToTopic_Demo_28, TFixture)
     UNIT_ASSERT_VALUES_EQUAL(messages.size(), 2);
 }
 
+void TFixture::WriteMessagesInTx(size_t big, size_t small)
+{
+    CreateTopic("topic_A", TEST_CONSUMER);
+
+    NTable::TSession tableSession = CreateTableSession();
+    NTable::TTransaction tx = BeginTx(tableSession);
+
+    for (size_t i = 0; i < big; ++i) {
+        WriteToTopic("topic_A", TEST_MESSAGE_GROUP_ID, TString(7'000'000, 'x'), &tx, 0);
+        WaitForAcks("topic_A", TEST_MESSAGE_GROUP_ID);
+    }
+
+    for (size_t i = 0; i < small; ++i) {
+        WriteToTopic("topic_A", TEST_MESSAGE_GROUP_ID, TString(16'384, 'x'), &tx, 0);
+        WaitForAcks("topic_A", TEST_MESSAGE_GROUP_ID);
+    }
+
+    CommitTx(tx, EStatus::SUCCESS);
+}
+
+Y_UNIT_TEST_F(WriteToTopic_Demo_29, TFixture)
+{
+    WriteMessagesInTx(1, 0);
+    WriteMessagesInTx(1, 0);
+}
+
+Y_UNIT_TEST_F(WriteToTopic_Demo_30, TFixture)
+{
+    WriteMessagesInTx(1, 0);
+    WriteMessagesInTx(0, 1);
+}
+
+Y_UNIT_TEST_F(WriteToTopic_Demo_31, TFixture)
+{
+    WriteMessagesInTx(1, 0);
+    WriteMessagesInTx(1, 1);
+}
+
+Y_UNIT_TEST_F(WriteToTopic_Demo_32, TFixture)
+{
+    WriteMessagesInTx(0, 1);
+    WriteMessagesInTx(1, 0);
+}
+
+Y_UNIT_TEST_F(WriteToTopic_Demo_33, TFixture)
+{
+    WriteMessagesInTx(0, 1);
+    WriteMessagesInTx(0, 1);
+}
+
+Y_UNIT_TEST_F(WriteToTopic_Demo_34, TFixture)
+{
+    WriteMessagesInTx(0, 1);
+    WriteMessagesInTx(1, 1);
+}
+
+Y_UNIT_TEST_F(WriteToTopic_Demo_35, TFixture)
+{
+    WriteMessagesInTx(1, 1);
+    WriteMessagesInTx(1, 0);
+}
+
+Y_UNIT_TEST_F(WriteToTopic_Demo_36, TFixture)
+{
+    WriteMessagesInTx(1, 1);
+    WriteMessagesInTx(0, 1);
+}
+
+Y_UNIT_TEST_F(WriteToTopic_Demo_37, TFixture)
+{
+    WriteMessagesInTx(1, 1);
+    WriteMessagesInTx(1, 1);
+}
+
+
+Y_UNIT_TEST_F(WriteToTopic_Demo_38, TFixture)
+{
+    WriteMessagesInTx(2, 202);
+    WriteMessagesInTx(2, 200);
+    WriteMessagesInTx(0, 1);
+    WriteMessagesInTx(4, 0);
+    WriteMessagesInTx(0, 1);
+}
+
 }
 
 }