diff --git a/kerfuffle/archive_kerfuffle.h b/kerfuffle/archive_kerfuffle.h
--- a/kerfuffle/archive_kerfuffle.h
+++ b/kerfuffle/archive_kerfuffle.h
@@ -190,6 +190,8 @@
     void setCompressionOptions(const CompressionOptions &opts);
     CompressionOptions compressionOptions() const;
     QString multiVolumeName() const;
+    // FIXME: this is only a temporary workaround. See T3300 for a proper fix.
+    bool hasBeenListed() const;
 
     static Archive *create(const QString &fileName, QObject *parent = 0);
     static Archive *create(const QString &fileName, const QString &fixedMimeType, QObject *parent = 0);
@@ -244,6 +246,9 @@
      */
     void encrypt(const QString &password, bool encryptHeader);
 
+signals:
+    void loadingFinished();
+
 private slots:
     void onListFinished(KJob*);
     void onAddFinished(KJob*);
diff --git a/kerfuffle/archive_kerfuffle.cpp b/kerfuffle/archive_kerfuffle.cpp
--- a/kerfuffle/archive_kerfuffle.cpp
+++ b/kerfuffle/archive_kerfuffle.cpp
@@ -466,6 +466,7 @@
     }
 
     m_hasBeenListed = true;
+    emit loadingFinished();
 }
 
 void Archive::listIfNotListed()
@@ -506,4 +507,9 @@
     return m_iface->multiVolumeName();
 }
 
+bool Archive::hasBeenListed() const
+{
+    return m_hasBeenListed;
+}
+
 } // namespace Kerfuffle
diff --git a/part/part.cpp b/part/part.cpp
--- a/part/part.cpp
+++ b/part/part.cpp
@@ -419,6 +419,7 @@
     // archives). If we added files they would not get encrypted resulting in an
     // archive with a mixture of encrypted and unencrypted files.
     const bool isEncryptedButUnknownPassword = m_model->archive() &&
+                                               m_model->archive()->hasBeenListed() &&
                                                m_model->archive()->encryptionType() != Archive::Unencrypted &&
                                                m_model->archive()->password().isEmpty();
 
@@ -671,6 +672,7 @@
     // Plugin loaded successfully.
     KJob *job = m_model->setArchive(archive.take());
     if (job) {
+        connect(archive.data(), &Archive::loadingFinished, this, &Part::updateActions);
         registerJob(job);
         job->start();
     } else {