--- a/sat/core/sat_main.py	Fri Aug 31 15:25:25 2018 +0200
+++ b/sat/core/sat_main.py	Fri Aug 31 15:29:25 2018 +0200
@@ -811,41 +811,15 @@
     def findFeaturesSet(self, *args, **kwargs):
         return self.memory.disco.findFeaturesSet(*args, **kwargs)
 
-    def _findByFeatures(
-        self,
-        namespaces,
-        identities,
-        bare_jids,
-        service,
-        roster,
-        own_jid,
-        local_device,
-        profile_key,
-    ):
+    def _findByFeatures(self, namespaces, identities, bare_jids, service, roster, own_jid,
+                        local_device, profile_key):
         client = self.getClient(profile_key)
-        return self.findByFeatures(
-            client,
-            namespaces,
-            identities,
-            bare_jids,
-            service,
-            roster,
-            own_jid,
-            local_device,
-        )
+        return self.findByFeatures(client, namespaces, identities, bare_jids, service,
+                                   roster, own_jid, local_device,)
 
     @defer.inlineCallbacks
-    def findByFeatures(
-        self,
-        client,
-        namespaces,
-        identities=None,
-        bare_jids=False,
-        service=True,
-        roster=True,
-        own_jid=True,
-        local_device=False,
-    ):
+    def findByFeatures(self, client, namespaces, identities=None, bare_jids=False,
+                       service=True, roster=True, own_jid=True, local_device=False):
         """retrieve all services or contacts managing a set a features
 
         @param namespaces(list[unicode]): features which must be handled
@@ -865,6 +839,7 @@
             - own entities
             - roster entities
         """
+        assert isinstance(namespaces, list)
         if not identities:
             identities = None
         if not namespaces and not identities:
@@ -888,16 +863,13 @@
                 ]
                 found_service[service_jid.full()] = found_identities
 
-        jids = []
-        if roster:
-            jids.extend(client.roster.getJids())
+        to_find = []
         if own_jid:
-            jids.append(client.jid.userhostJID())
+            to_find.append((found_own, [client.jid.userhostJID()]))
+        if roster:
+            to_find.append((found_roster, client.roster.getJids()))
 
-        for found, jids in (
-            (found_own, [client.jid.userhostJID()]),
-            (found_roster, client.roster.getJids()),
-        ):
+        for found, jids in to_find:
             for jid_ in jids:
                 if jid_.resource:
                     if bare_jids:
@@ -911,6 +883,11 @@
                             resources = self.memory.getAvailableResources(client, jid_)
                         except exceptions.UnknownEntityError:
                             continue
+                        if not resources and jid_ == client.jid.userhostJID() and own_jid:
+                            # small hack to avoid missing our own resource when this
+                            # method is called at the very beginning of the session
+                            # and our presence has not been received yet
+                            resources = [client.jid.resource]
                 for resource in resources:
                     full_jid = jid.JID(tuple=(jid_.user, jid_.host, resource))
                     if full_jid == client.jid and not local_device: