diff --git a/src/gui/qgsadvanceddigitizingdockwidget.cpp b/src/gui/qgsadvanceddigitizingdockwidget.cpp
index c14c551d2ab..014a87cb63f 100644
--- a/src/gui/qgsadvanceddigitizingdockwidget.cpp
+++ b/src/gui/qgsadvanceddigitizingdockwidget.cpp
@@ -914,14 +914,19 @@ bool QgsAdvancedDigitizingDockWidget::applyConstraints( QgsMapMouseEvent *e )
    * a Z value.
    * To get the value we use the snapPoint method. However, we only apply it
    * when the snapped point corresponds to the constrained point or on an edge
-   * if the topological editing is activated.
+   * if the topological editing is activated. Also, we don't apply it if
+   * the point is not linked to a layer.
    */
   e->setMapPoint( point );
   mSnapMatch = context.snappingUtils->snapToMap( point, nullptr, true );
-  if ( ( ( mSnapMatch.hasVertex() || mSnapMatch.hasLineEndpoint() ) && ( point == mSnapMatch.point() ) ) || ( mSnapMatch.hasEdge() && QgsProject::instance()->topologicalEditing() ) )
+  if ( mSnapMatch.layer() )
   {
-    e->snapPoint();
-    point = mSnapMatch.interpolatedPoint( mMapCanvas->mapSettings().destinationCrs() );
+    if ( ( ( mSnapMatch.hasVertex() || mSnapMatch.hasLineEndpoint() ) && ( point == mSnapMatch.point() ) )
+         || ( mSnapMatch.hasEdge() && QgsProject::instance()->topologicalEditing() ) )
+    {
+      e->snapPoint();
+      point = mSnapMatch.interpolatedPoint( mMapCanvas->mapSettings().destinationCrs() );
+    }
   }
 
   /*