Index: src/org/openstreetmap/josm/gui/dialogs/ValidatorDialog.java
===================================================================
--- src/org/openstreetmap/josm/gui/dialogs/ValidatorDialog.java	(revision 14821)
+++ src/org/openstreetmap/josm/gui/dialogs/ValidatorDialog.java	(working copy)
@@ -33,6 +33,7 @@
 import org.openstreetmap.josm.actions.ValidateAction;
 import org.openstreetmap.josm.actions.relation.EditRelationAction;
 import org.openstreetmap.josm.command.Command;
+import org.openstreetmap.josm.command.SequenceCommand;
 import org.openstreetmap.josm.data.UndoRedoHandler;
 import org.openstreetmap.josm.data.osm.DataSelectionListener;
 import org.openstreetmap.josm.data.osm.DataSet;
@@ -590,7 +591,7 @@
                 }
                 monitor.subTask(tr("Updating map ..."));
                 SwingUtilities.invokeAndWait(() -> {
-                    UndoRedoHandler.getInstance().afterAdd(fixCommands);
+                    UndoRedoHandler.getInstance().afterAdd(new SequenceCommand("fix",fixCommands));
                     invalidateValidatorLayers();
                     tree.resetErrors();
                 });