If the TsComboBox control is anchored to right and you resize the form, the control is flickering a selection when it is not focused.
You can repeat this with your demo:
For example
1. Set Frame_Others.sComboBox1.Anchors := [akLeft,akTop,akRight];
2. Set Frame_Others.Align := alClient
3. Set MainForm.PanelContainer.Align := alClient
4. Run the demo
5. Go to Examples of components -> Additional components -> Unsorted
6. Select something from SkinSection combobox
7. Focus some other control
8. Resize the form and the flickering occurs