diff --git a/src/core/layout/qgslayoutitemgroup.cpp b/src/core/layout/qgslayoutitemgroup.cpp
index 48041cd30f7a..b9896a4a4054 100644
--- a/src/core/layout/qgslayoutitemgroup.cpp
+++ b/src/core/layout/qgslayoutitemgroup.cpp
@@ -206,7 +206,8 @@ void QgsLayoutItemGroup::attemptResize( const QgsLayoutSize &size, bool includes
       command->saveBeforeState();
     }
 
-    QRectF itemRect = mapRectFromItem( item, item->rect() );
+    const QRectF originalItemRect = item->rect();
+    QRectF itemRect = mapRectFromItem( item, originalItemRect );
     QgsLayoutUtils::relativeResizeRect( itemRect, oldRect, newRect );
 
     itemRect = itemRect.normalized();
diff --git a/src/core/layout/qgslayoututils.cpp b/src/core/layout/qgslayoututils.cpp
index 73810b8f825a..6cf09cae422b 100644
--- a/src/core/layout/qgslayoututils.cpp
+++ b/src/core/layout/qgslayoututils.cpp
@@ -156,10 +156,18 @@ QgsRenderContext QgsLayoutUtils::createRenderContextForLayout( QgsLayout *layout
 void QgsLayoutUtils::relativeResizeRect( QRectF &rectToResize, const QRectF &boundsBefore, const QRectF &boundsAfter )
 {
   //linearly scale rectToResize relative to the scaling from boundsBefore to boundsAfter
-  double left = relativePosition( rectToResize.left(), boundsBefore.left(), boundsBefore.right(), boundsAfter.left(), boundsAfter.right() );
-  double right = relativePosition( rectToResize.right(), boundsBefore.left(), boundsBefore.right(), boundsAfter.left(), boundsAfter.right() );
-  double top = relativePosition( rectToResize.top(), boundsBefore.top(), boundsBefore.bottom(), boundsAfter.top(), boundsAfter.bottom() );
-  double bottom = relativePosition( rectToResize.bottom(), boundsBefore.top(), boundsBefore.bottom(), boundsAfter.top(), boundsAfter.bottom() );
+  const double left = !qgsDoubleNear( boundsBefore.left(), boundsBefore.right() )
+                      ? relativePosition( rectToResize.left(), boundsBefore.left(), boundsBefore.right(), boundsAfter.left(), boundsAfter.right() )
+                      : boundsAfter.left();
+  const double right = !qgsDoubleNear( boundsBefore.left(), boundsBefore.right() )
+                       ? relativePosition( rectToResize.right(), boundsBefore.left(), boundsBefore.right(), boundsAfter.left(), boundsAfter.right() )
+                       : boundsAfter.right();
+  const double top = !qgsDoubleNear( boundsBefore.top(), boundsBefore.bottom() )
+                     ? relativePosition( rectToResize.top(), boundsBefore.top(), boundsBefore.bottom(), boundsAfter.top(), boundsAfter.bottom() )
+                     : boundsAfter.top();
+  const double bottom = !qgsDoubleNear( boundsBefore.top(), boundsBefore.bottom() )
+                        ? relativePosition( rectToResize.bottom(), boundsBefore.top(), boundsBefore.bottom(), boundsAfter.top(), boundsAfter.bottom() )
+                        : boundsAfter.bottom();
 
   rectToResize.setRect( left, top, right - left, bottom - top );
 }