diff --git a/cmd/proxy/config/config.toml b/cmd/proxy/config/config.toml
index d61623a5..13ea7789 100644
--- a/cmd/proxy/config/config.toml
+++ b/cmd/proxy/config/config.toml
@@ -74,14 +74,6 @@
    Address = "http://127.0.0.1:8082"
 
 [[Observers]]
-   ShardId = 1
-   Address = "http://127.0.0.1:8083"
-   IsFallback = true
-
-[[FullHistoryNodes]]
-   ShardId = 0
-   Address = "http://127.0.0.1:8081"
-
-[[FullHistoryNodes]]
-   ShardId = 1
-   Address = "http://127.0.0.1:8082"
+   ShardId = 4294967295
+   Address = "http://127.0.0.1:8083
+   IsFallback = false
diff --git a/observer/baseNodeProvider.go b/observer/baseNodeProvider.go
index 07f475df..e5c0724c 100644
--- a/observer/baseNodeProvider.go
+++ b/observer/baseNodeProvider.go
@@ -405,6 +405,7 @@ func (bnp *baseNodeProvider) ReloadNodes(nodesType data.NodeType) data.NodesRelo
 	bnp.mutNodes.Lock()
 	bnp.shardIds = getSortedShardIDsSlice(newNodes)
 	bnp.syncedNodes, bnp.syncedFallbackNodes = initAllNodesSlice(newNodes)
+	bnp.outOfSyncNodes, bnp.outOfSyncFallbackNodes = make([]*data.NodeData, 0), make([]*data.NodeData, 0)
 	bnp.lastSyncedNodes = make(map[uint32]*data.NodeData)
 	bnp.mutNodes.Unlock()