diff --git a/core/monitor_p.cpp b/monitor_p.cpp
--- a/core/monitor_p.cpp
+++ b/monitor_p.cpp
@@ -1061,25 +1061,25 @@
     bool handled = false;
     switch (msg.operation()) {
     case Protocol::ItemChangeNotification::Add:
-        return emitToListeners(&Monitor::itemAdded, its.first(), col);
+        return !its.isEmpty() && emitToListeners(&Monitor::itemAdded, its.first(), col);
     case Protocol::ItemChangeNotification::Modify:
-        return emitToListeners(&Monitor::itemChanged, its.first(), msg.itemParts());
+        return !its.isEmpty() && emitToListeners(&Monitor::itemChanged, its.first(), msg.itemParts());
     case Protocol::ItemChangeNotification::ModifyFlags:
         return emitToListeners(&Monitor::itemsFlagsChanged, its, msg.addedFlags(), msg.removedFlags());
     case Protocol::ItemChangeNotification::Move:
-        handled |= emitToListeners(&Monitor::itemMoved, its.first(), col, colDest);
+        handled |= !its.isEmpty() && emitToListeners(&Monitor::itemMoved, its.first(), col, colDest);
         handled |= emitToListeners(&Monitor::itemsMoved, its, col, colDest);
         return handled;
     case Protocol::ItemChangeNotification::Remove:
-        handled |= emitToListeners(&Monitor::itemRemoved, its.first());
+        handled |= !its.isEmpty() && emitToListeners(&Monitor::itemRemoved, its.first());
         handled |= emitToListeners(&Monitor::itemsRemoved, its);
         return handled;
     case Protocol::ItemChangeNotification::Link:
-        handled |= emitToListeners(&Monitor::itemLinked, its.first(), col);
+        handled |= !its.isEmpty() && emitToListeners(&Monitor::itemLinked, its.first(), col);
         handled |= emitToListeners(&Monitor::itemsLinked, its, col);
         return handled;
     case Protocol::ItemChangeNotification::Unlink:
-        handled |= emitToListeners(&Monitor::itemUnlinked, its.first(), col);
+        handled |= !its.isEmpty() && emitToListeners(&Monitor::itemUnlinked, its.first(), col);
         handled |= emitToListeners(&Monitor::itemsUnlinked, its, col);
         return handled;
     case Protocol::ItemChangeNotification::ModifyTags: