diff --git a/lcl/interfaces/qt/qtwscontrols.pp b/lcl/interfaces/qt/qtwscontrols.pp
index 9f4218bffe..e7164aa6f0 100644
--- a/lcl/interfaces/qt/qtwscontrols.pp
+++ b/lcl/interfaces/qt/qtwscontrols.pp
@@ -307,8 +307,9 @@ class procedure TQtWSWinControl.SetText(const AWinControl: TWinControl;
 begin
   if not WSCheckHandleAllocated(AWincontrol, 'SetText') then
     Exit;
-
+  TQtWidget(AWinControl.Handle).BeginUpdate;
   TQtWidget(AWinControl.Handle).setText(GetUtf8String(AText));
+  TQtWidget(AWinControl.Handle).EndUpdate;
 end;
 
 class procedure TQtWSWinControl.SetChildZPosition(const AWinControl,
diff --git a/lcl/interfaces/qt/qtwsstdctrls.pp b/lcl/interfaces/qt/qtwsstdctrls.pp
index 602ee3b628..0ed2f177e3 100644
--- a/lcl/interfaces/qt/qtwsstdctrls.pp
+++ b/lcl/interfaces/qt/qtwsstdctrls.pp
@@ -1165,15 +1165,28 @@ class function TQtWSCustomComboBox.CreateHandle(const AWinControl: TWinControl;
   const AParams: TCreateParams): TLCLIntfHandle;
 var
   QtComboBox: TQtComboBox;
+  ItemIndex: Integer;
+  Text: String;
 begin
   QtComboBox := TQtComboBox.Create(AWinControl, AParams);
-  QtComboBox.AttachEvents;
-  QtComboBox.OwnerDrawn := TCustomComboBox(AWinControl).Style in [csOwnerDrawFixed, csOwnerDrawVariable];
 
   // create our FList helper
   QtComboBox.FList := TQtComboStrings.Create(AWinControl, QtComboBox);
   QtComboBox.setMaxVisibleItems(TCustomComboBox(AWinControl).DropDownCount);
 
+  // load combo data imediatelly and set LCLs itemIndex and Text otherwise
+  // qt will set itemindex to 0 if lcl itemindex = -1.
+  ItemIndex := TCustomComboBox(AWinControl).ItemIndex;
+  Text := TCustomComboBox(AWinControl).Text;
+  QtComboBox.FList.Assign(TCustomComboBox(AWinControl).Items);
+  QtComboBox.setCurrentIndex(ItemIndex);
+  QtComboBox.setText(GetUTF8String(Text));
+  QtComboBox.setEditable(AParams.Style and CBS_DROPDOWN <> 0);
+
+  QtComboBox.AttachEvents;
+  QtComboBox.OwnerDrawn := (AParams.Style and CBS_OWNERDRAWFIXED <> 0) or
+    (AParams.Style and CBS_OWNERDRAWVARIABLE <> 0);
+
   Result := TLCLIntfHandle(QtComboBox);
 end;