diff --git a/.github/workflows/slo-topic.yaml b/.github/workflows/slo-topic.yaml
index 919bfd30..2a21051a 100644
--- a/.github/workflows/slo-topic.yaml
+++ b/.github/workflows/slo-topic.yaml
@@ -28,7 +28,6 @@ jobs:
           cd slo/src/TopicService
           dotnet run create "Host=localhost;Port=2135;Database=/Root/testdb"
       - name: Run SLO Tests
-        continue-on-error: true
         run: |
           cd slo/src/TopicService
           dotnet run run "Host=localhost;Port=2135;Database=/Root/testdb" \
diff --git a/src/Ydb.Sdk/CHANGELOG.md b/src/Ydb.Sdk/CHANGELOG.md
index 98b6b1e1..87fff2a7 100644
--- a/src/Ydb.Sdk/CHANGELOG.md
+++ b/src/Ydb.Sdk/CHANGELOG.md
@@ -1,13 +1,17 @@
+- Fixed bug: Unhandled exception.
+  System.Net.Http.HttpIOException ([#452](https://github.com/ydb-platform/ydb-dotnet-sdk/issues/451)).
 - dev: LogLevel `Warning` -> `Debug` on AttachStream has been cancelled.
 
 ## v0.18.0
 
-- Disable Discovery mode: skip discovery step and client balancing and use connection to start endpoint ([#420](https://github.com/ydb-platform/ydb-dotnet-sdk/issues/420)).
+- Disable Discovery mode: skip discovery step and client balancing and use connection to start
+  endpoint ([#420](https://github.com/ydb-platform/ydb-dotnet-sdk/issues/420)).
 
 ## v0.17.0
 
 - Shutdown channels which are removed from the EndpointPool after discovery calls.
-- Fixed bug: Received message exceeds the maximum configured message size ([#421](https://github.com/ydb-platform/ydb-dotnet-sdk/issues/421)).
+- Fixed bug: Received message exceeds the maximum configured message
+  size ([#421](https://github.com/ydb-platform/ydb-dotnet-sdk/issues/421)).
 - Added `MaxSendMessageSize` \ `MaxReceiveMessageSize` grpc message size settings.
 - Added `EnableMultipleHttp2Connections` setting to grpc channel.
 - `Connection.State` is set to `Broken` when the session is deactivated.
diff --git a/src/Ydb.Sdk/src/Services/Topic/Reader/Reader.cs b/src/Ydb.Sdk/src/Services/Topic/Reader/Reader.cs
index 1513f387..9df59891 100644
--- a/src/Ydb.Sdk/src/Services/Topic/Reader/Reader.cs
+++ b/src/Ydb.Sdk/src/Services/Topic/Reader/Reader.cs
@@ -198,9 +198,9 @@ await stream.AuthToken(),
                 _deserializer
             );
         }
-        catch (Driver.TransportException e)
+        catch (Exception e)
         {
-            _logger.LogError(e, "Transport error on executing ReaderSession");
+            _logger.LogError(e, "Error on executing ReaderSession");
 
             _ = Task.Run(Initialize, _disposeCts.Token);
         }
@@ -338,9 +338,9 @@ private async Task RunProcessingStreamResponse()
 
             Logger.LogInformation("ReaderSession[{SessionId}]: ResponseStream is closed", SessionId);
         }
-        catch (Driver.TransportException e)
+        catch (Exception e)
         {
-            Logger.LogError(e, "ReaderSession[{SessionId}] have transport error on processing server messages",
+            Logger.LogError(e, "ReaderSession[{SessionId}] have error on processing server messages",
                 SessionId);
         }
         finally
@@ -360,9 +360,9 @@ private async Task RunProcessingStreamRequest()
                 await SendMessage(messageFromClient);
             }
         }
-        catch (Driver.TransportException e)
+        catch (Exception e)
         {
-            Logger.LogError(e, "ReaderSession[{SessionId}] have transport error on Write", SessionId);
+            Logger.LogError(e, "ReaderSession[{SessionId}] have error on Write", SessionId);
 
             ReconnectSession();
 
diff --git a/src/Ydb.Sdk/src/Services/Topic/Writer/Writer.cs b/src/Ydb.Sdk/src/Services/Topic/Writer/Writer.cs
index 62b7cd43..a05a4ca0 100644
--- a/src/Ydb.Sdk/src/Services/Topic/Writer/Writer.cs
+++ b/src/Ydb.Sdk/src/Services/Topic/Writer/Writer.cs
@@ -314,16 +314,16 @@ await stream.AuthToken(),
                 _sendInFlightMessagesSemaphoreSlim.Release();
             }
         }
-        catch (Driver.TransportException e)
-        {
-            _logger.LogError(e, "Transport error on creating WriterSession");
-
-            _ = Task.Run(Initialize);
-        }
         catch (OperationCanceledException)
         {
             _logger.LogInformation("Initialize writer is canceled because it has been disposed");
         }
+        catch (Exception e)
+        {
+            _logger.LogError(e, "Error on creating WriterSession");
+
+            _ = Task.Run(Initialize);
+        }
     }
 
     public async ValueTask DisposeAsync()
@@ -493,9 +493,9 @@ public async Task Write(ConcurrentQueue<MessageSending> toSendBuffer)
             Volatile.Write(ref _seqNum, currentSeqNum);
             await SendMessage(new MessageFromClient { WriteRequest = writeMessage });
         }
-        catch (Driver.TransportException e)
+        catch (Exception e)
         {
-            Logger.LogError(e, "WriterSession[{SessionId}] have transport error on Write, last SeqNo={SeqNo}",
+            Logger.LogError(e, "WriterSession[{SessionId}] have error on Write, last SeqNo={SeqNo}",
                 SessionId, Volatile.Read(ref _seqNum));
 
             ReconnectSession();
@@ -564,7 +564,7 @@ Completing task on exception...
 
             Logger.LogInformation("WriterSession[{SessionId}]: ResponseStream is closed", SessionId);
         }
-        catch (Driver.TransportException e)
+        catch (Exception e)
         {
             Logger.LogError(e, "WriterSession[{SessionId}] have error on processing writeAck", SessionId);
         }