diff --git a/lcl/interfaces/qt5/qtwidgets.pas b/lcl/interfaces/qt5/qtwidgets.pas
index d98f0ad3e6..54c4119ce0 100644
--- a/lcl/interfaces/qt5/qtwidgets.pas
+++ b/lcl/interfaces/qt5/qtwidgets.pas
@@ -7624,7 +7624,12 @@ begin
     Result := inherited getClientOffset;
   if Assigned(ScrollArea) and Assigned(FMenuBar) and
     (FMenuBar.getVisible) then
+  begin
+    if Assigned(LCLObject) and IsFormDesign(LCLObject) and (LCLObject.Parent <> nil) then
+      // issue #41637
+    else
       inc(Result.Y, FMenuBar.getHeight);
+  end;
   {$ELSE}
   Result:=inherited getClientOffset;
   {$ENDIF}
diff --git a/lcl/interfaces/qt6/qtwidgets.pas b/lcl/interfaces/qt6/qtwidgets.pas
index f56c1b8c40..e2ab859498 100644
--- a/lcl/interfaces/qt6/qtwidgets.pas
+++ b/lcl/interfaces/qt6/qtwidgets.pas
@@ -7544,7 +7544,12 @@ begin
     Result := inherited getClientOffset;
   if Assigned(ScrollArea) and Assigned(FMenuBar) and
     (FMenuBar.getVisible) then
+  begin
+    if Assigned(LCLObject) and IsFormDesign(LCLObject) and (LCLObject.Parent <> nil) then
+      // issue #41637
+    else
       inc(Result.Y, FMenuBar.getHeight);
+  end;
   {$ELSE}
   Result:=inherited getClientOffset;
   {$ENDIF}