diff --git a/src/main/java/eu/siacs/conversations/ui/RtpSessionActivity.java b/src/main/java/eu/siacs/conversations/ui/RtpSessionActivity.java
index a6ac2ba1b..4a68d1b03 100644
--- a/src/main/java/eu/siacs/conversations/ui/RtpSessionActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/RtpSessionActivity.java
@@ -412,12 +412,14 @@ public class RtpSessionActivity extends XmppActivity implements XmppConnectionSe
         final WeakReference<JingleRtpConnection> reference = xmppConnectionService.getJingleConnectionManager()
                 .findJingleRtpConnection(account, with, sessionId);
         if (reference == null || reference.get() == null) {
+            Log.e(Config.LOGTAG,"failed to initialize activity with running rtp session. session not found");
             finish();
             return true;
         }
         this.rtpConnectionReference = reference;
         final RtpEndUserState currentState = requireRtpConnection().getEndUserState();
         if (currentState == RtpEndUserState.ENDED) {
+            Log.e(Config.LOGTAG,"failed to initialize activity with running rtp session. session had ended");
             finish();
             return true;
         }
diff --git a/src/main/java/eu/siacs/conversations/xmpp/jingle/AbstractJingleConnection.java b/src/main/java/eu/siacs/conversations/xmpp/jingle/AbstractJingleConnection.java
index ef28a2eb3..d95019048 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/jingle/AbstractJingleConnection.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/jingle/AbstractJingleConnection.java
@@ -1,5 +1,6 @@
 package eu.siacs.conversations.xmpp.jingle;
 
+import com.google.common.base.MoreObjects;
 import com.google.common.base.Objects;
 import com.google.common.base.Preconditions;
 
@@ -78,14 +79,14 @@ public abstract class AbstractJingleConnection {
             if (this == o) return true;
             if (o == null || getClass() != o.getClass()) return false;
             Id id = (Id) o;
-            return Objects.equal(account.getJid(), id.account.getJid()) &&
+            return Objects.equal(account.getUuid(), id.account.getUuid()) &&
                     Objects.equal(with, id.with) &&
                     Objects.equal(sessionId, id.sessionId);
         }
 
         @Override
         public int hashCode() {
-            return Objects.hashCode(account.getJid(), with, sessionId);
+            return Objects.hashCode(account.getUuid(), with, sessionId);
         }
 
         @Override
@@ -102,6 +103,15 @@ public abstract class AbstractJingleConnection {
         public String getSessionId() {
             return sessionId;
         }
+
+        @Override
+        public String toString() {
+            return MoreObjects.toStringHelper(this)
+                    .add("account", account.getJid())
+                    .add("with", with)
+                    .add("sessionId", sessionId)
+                    .toString();
+        }
     }
 
 
diff --git a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnectionManager.java b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnectionManager.java
index d8be779ef..0e161bd5a 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnectionManager.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnectionManager.java
@@ -134,7 +134,7 @@ public class JingleConnectionManager extends AbstractConnectionManager {
         }
     }
 
-    public Optional<RtpSessionProposal> findMatchingSessionProposal(final Account account, final Jid with, final Set<Media> media) {
+    private Optional<RtpSessionProposal> findMatchingSessionProposal(final Account account, final Jid with, final Set<Media> media) {
         synchronized (this.rtpSessionProposals) {
             for (Map.Entry<RtpSessionProposal, DeviceDiscoveryState> entry : this.rtpSessionProposals.entrySet()) {
                 final RtpSessionProposal proposal = entry.getKey();
@@ -446,7 +446,10 @@ public class JingleConnectionManager extends AbstractConnectionManager {
     }
 
     void finishConnection(final AbstractJingleConnection connection) {
-        this.connections.remove(connection.getId());
+        final AbstractJingleConnection.Id id = connection.getId();
+        if (this.connections.remove(id) == null) {
+            throw new IllegalStateException(String.format("Unable to finish connection with id=%s", id.toString()));
+        }
     }
 
     void getPrimaryCandidate(final Account account, final boolean initiator, final OnPrimaryCandidateFound listener) {
@@ -667,7 +670,7 @@ public class JingleConnectionManager extends AbstractConnectionManager {
         throw e;
     }
 
-    public void endSession(AbstractJingleConnection.Id id, final AbstractJingleConnection.State state) {
+    void endSession(AbstractJingleConnection.Id id, final AbstractJingleConnection.State state) {
         this.endedSessions.put(PersistableSessionId.of(id), state);
     }