diff --git a/kde/gui/chatblockmodel.cpp b/kde/gui/chatblockmodel.cpp
index 3964bfc..2b910cd 100644
--- a/kde/gui/chatblockmodel.cpp
+++ b/kde/gui/chatblockmodel.cpp
@@ -242,6 +242,7 @@ void ChatBlockModel::reset()
     m_fenceContent.clear();
     m_pendingDiagrams.clear();
     m_inFlightRequests.clear();
+    m_blockIdCounter = 0;  // Reset so same chat produces same IDs
     endResetModel();
     emit countChanged();
 }