diff --git a/src/main/java/eu/siacs/conversations/entities/Bookmark.java b/src/main/java/eu/siacs/conversations/entities/Bookmark.java
index 11523dae5777818a509b2cd32e9e9ef92e3241d2..592016b97f560661fc8d69a3e8341d6d1e3d9b04 100644
--- a/src/main/java/eu/siacs/conversations/entities/Bookmark.java
+++ b/src/main/java/eu/siacs/conversations/entities/Bookmark.java
@@ -164,6 +164,10 @@ public class Bookmark extends Element implements ListItem {
 			return 1;
 		}
 
+		if (getDisplayName().equals(another.getDisplayName())) {
+			return getJid().compareTo(another.getJid());
+		}
+
 		return this.getDisplayName().compareToIgnoreCase(
 				another.getDisplayName());
 	}
diff --git a/src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java b/src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java
index 9dd1f2a5f3db65bf2673289f9d2d1331906e739d..97fc0b8917c38bdedb8fcf370e06d571dd473e2d 100644
--- a/src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java
@@ -1319,7 +1319,7 @@ public class StartConversationActivity extends XmppActivity
 
     protected void filter(String needle) {
         if (xmppConnectionServiceBound) {
-            this.filterContacts(needle);
+            synchronized(this.contacts) { this.filterContacts(needle); }
             this.filterConferences(needle);
         }
     }