diff --git a/client/adventureMap/AdventureMapInterface.cpp b/client/adventureMap/AdventureMapInterface.cpp
index c9b9e28da..8aa0de501 100644
--- a/client/adventureMap/AdventureMapInterface.cpp
+++ b/client/adventureMap/AdventureMapInterface.cpp
@@ -441,12 +441,10 @@ void AdventureMapInterface::onPlayerTurnStarted(PlayerColor playerID)
 		if(auto iw = GH.windows().topWindow<CInfoWindow>())
 			iw->close();
 
-		boost::thread newThread([this]()
-			{
-				hotkeyEndingTurn();
-			});
-
-		newThread.detach();
+		GH.dispatchMainThread([this]()
+		{
+			hotkeyEndingTurn();
+		});
 	}
 }
 
diff --git a/lib/mapping/MapReaderH3M.cpp b/lib/mapping/MapReaderH3M.cpp
index 4fb3917d2..4a1c75e49 100644
--- a/lib/mapping/MapReaderH3M.cpp
+++ b/lib/mapping/MapReaderH3M.cpp
@@ -83,7 +83,10 @@ ArtifactID MapReaderH3M::readArtifact()
 
 ArtifactID MapReaderH3M::readArtifact8()
 {
-	ArtifactID result(reader->readInt8());
+	ArtifactID result(reader->readUInt8());
+
+	if(result.getNum() == 0xff)
+		return ArtifactID::NONE;
 
 	if (result.getNum() < features.artifactsCount)
 		return remapIdentifier(result);
diff --git a/lib/pathfinder/CPathfinder.cpp b/lib/pathfinder/CPathfinder.cpp
index a713b5bdc..46d4f564b 100644
--- a/lib/pathfinder/CPathfinder.cpp
+++ b/lib/pathfinder/CPathfinder.cpp
@@ -40,19 +40,11 @@ bool CPathfinderHelper::canMoveFromNode(const PathNodeInfo & source) const
 	if (source.node->isTeleportAction())
 		return true;
 
-	// we can go through garrisons
-	if (source.nodeObject->ID == MapObjectID::GARRISON || source.nodeObject->ID == MapObjectID::GARRISON2)
-		return true;
+	// we can not go through teleporters since moving onto a teleport will teleport hero and may invalidate path (e.g. one-way teleport or enemy hero on other side)
+	if (dynamic_cast<const CGTeleport*>(source.nodeObject) != nullptr)
+		return false;
 
-	// or through border gate (if we stand on it then we already have the key)
-	if (source.nodeObject->ID == MapObjectID::BORDER_GATE)
-		return true;
-
-	// or "through" boat, but only if this is embarking
-	if (source.nodeObject->ID == MapObjectID::BOAT && source.node->action == EPathNodeAction::EMBARK)
-		return true;
-
-	return false;
+	return true;
 }
 
 std::vector<int3> CPathfinderHelper::getNeighbourTiles(const PathNodeInfo & source) const
diff --git a/lib/serializer/Connection.cpp b/lib/serializer/Connection.cpp
index c4c98f4f6..de5f3b85d 100644
--- a/lib/serializer/Connection.cpp
+++ b/lib/serializer/Connection.cpp
@@ -221,6 +221,8 @@ int CConnection::read(void * data, unsigned size)
 
 CConnection::~CConnection()
 {
+	close();
+
 	if(handler)
 	{
 		// ugly workaround to avoid self-join if last strong reference to shared_ptr that owns this class has been released in this very thread, e.g. on netpack processing
@@ -229,8 +231,6 @@ CConnection::~CConnection()
 		else
 			handler->detach();
 	}
-
-	close();
 }
 
 template<class T>
@@ -246,6 +246,15 @@ void CConnection::close()
 {
 	if(socket)
 	{
+		try
+		{
+			socket->shutdown(boost::asio::ip::tcp::socket::shutdown_receive);
+		}
+		catch (const boost::system::system_error & e)
+		{
+			logNetwork->error("error closing socket: %s", e.what());
+		}
+
 		socket->close();
 		socket.reset();
 	}
diff --git a/server/processors/TurnOrderProcessor.cpp b/server/processors/TurnOrderProcessor.cpp
index 87a63cb92..db3969124 100644
--- a/server/processors/TurnOrderProcessor.cpp
+++ b/server/processors/TurnOrderProcessor.cpp
@@ -263,8 +263,6 @@ void TurnOrderProcessor::onPlayerEndsGame(PlayerColor which)
 
 	if (actingPlayers.empty())
 		doStartNewDay();
-
-	assert(!actingPlayers.empty());
 }
 
 bool TurnOrderProcessor::onPlayerEndsTurn(PlayerColor which)