diff --git a/src/sakia/gui/community_view.py b/src/sakia/gui/community_view.py
index c6e65450..a28c3f20 100644
--- a/src/sakia/gui/community_view.py
+++ b/src/sakia/gui/community_view.py
@@ -231,14 +231,10 @@ async def refresh_status(self):
         if self.community:
             text = ""
 
-            logging.debug("Here I am with {0}".format(self.community))
             current_block_number = self.community.network.current_blockid.number
             if current_block_number:
-                text += self.tr(" Block {0}").format(current_block_number)
                 try:
-                    logging.debug("Before get _block {0}".format(self.community))
                     block = await self.community.get_block(current_block_number)
-                    logging.debug("After get _block {0}".format(self.community))
                     text += " ({0})".format(QLocale.toString(
                                 QLocale(),
                                 QDateTime.fromTime_t(block['medianTime']),
@@ -250,7 +246,6 @@ async def refresh_status(self):
                 except ValueError as e:
                     logging.debug(str(e))
 
-            logging.debug("I can crash now {0}".format(self.community))
             if len(self.community.network.synced_nodes) == 0:
                 self.button_membership.setEnabled(False)
                 self.button_certification.setEnabled(False)
diff --git a/src/sakia/gui/network_tab.py b/src/sakia/gui/network_tab.py
index f3dc1e30..3264a1b0 100644
--- a/src/sakia/gui/network_tab.py
+++ b/src/sakia/gui/network_tab.py
@@ -49,12 +49,14 @@ def change_community(self, community):
             community.network.nodes_changed.connect(self.refresh_nodes)
 
         self.community = community
-        self.table_network.model().change_community(community)
+        refresh_task = self.table_network.model().change_community(community)
+        refresh_task.add_done_callback(lambda fut: self.table_network.resizeColumnsToContents())
 
     @pyqtSlot()
     def refresh_nodes(self):
         logging.debug("Refresh nodes")
-        self.table_network.model().sourceModel().refresh_nodes()
+        refresh_task = self.table_network.model().sourceModel().refresh_nodes()
+        refresh_task.add_done_callback(lambda fut: self.table_network.resizeColumnsToContents())
 
     def node_context_menu(self, point):
         index = self.table_network.indexAt(point)
diff --git a/src/sakia/gui/transactions_tab.py b/src/sakia/gui/transactions_tab.py
index 5a139ec8..5c7892a0 100644
--- a/src/sakia/gui/transactions_tab.py
+++ b/src/sakia/gui/transactions_tab.py
@@ -111,8 +111,8 @@ async def refresh_minimum_maximum(self):
 
     def refresh(self):
         if self.community:
-            self.ui.table_history.model().sourceModel().refresh_transfers()
-            self.ui.table_history.resizeColumnsToContents()
+            refresh_task = self.ui.table_history.model().sourceModel().refresh_transfers()
+            refresh_task.add_done_callback(lambda fut: self.ui.table_history.resizeColumnsToContents())
             self.refresh_minimum_maximum()
             self.refresh_balance()
 
diff --git a/src/sakia/models/network.py b/src/sakia/models/network.py
index e8b1ee4f..5657bc4e 100644
--- a/src/sakia/models/network.py
+++ b/src/sakia/models/network.py
@@ -24,8 +24,14 @@ def columnCount(self, parent):
         return self.sourceModel().columnCount(None) - 2
 
     def change_community(self, community):
+        """
+        Change current community and returns refresh task
+        :param sakia.core.Community community:
+        :return: the refresh task
+        :rtype: asyncio.Task
+        """
         self.community = community
-        self.sourceModel().change_community(community)
+        return self.sourceModel().change_community(community)
 
     def setSourceModel(self, sourceModel):
         self.community = sourceModel.community
@@ -146,9 +152,15 @@ def __init__(self, community, parent=None):
         self.nodes_data = []
 
     def change_community(self, community):
+        """
+        Change current community displayed in network and refresh the nodes
+        :param sakia.core.Community community: the new community
+        :return: the refresh task
+        :rtype: asyncio.Task
+        """
         cancel_once_task(self, self.refresh_nodes)
         self.community = community
-        self.refresh_nodes()
+        return self.refresh_nodes()
 
     async def data_node(self, node: Node) -> tuple:
         """
diff --git a/src/sakia/tools/decorators.py b/src/sakia/tools/decorators.py
index 8c74f57a..669e89bf 100644
--- a/src/sakia/tools/decorators.py
+++ b/src/sakia/tools/decorators.py
@@ -44,6 +44,12 @@ def start_task():
 
 
 def asyncify(fn):
+    """
+    Instanciates a coroutine in a task
+    :param fn: the coroutine to run
+    :return: the task
+    :rtype: asyncio.Task
+    """
     @functools.wraps(fn)
     def wrapper(*args, **kwargs):
         return asyncio.ensure_future(asyncio.coroutine(fn)(*args, **kwargs))