WinForms Guna UI: Controls with Top-Right Anchor jump during side menu animation(2025)

Question

public partial class MainForm : Form
{
    bool isCollapsed2 = false;

    public MainForm()
    {
        InitializeComponent();
    }
    private void timer1_Tick(object sender, EventArgs e)
    {

         if (isCollapsed2)
         {
             guna2Panel1.Width += 100;
             if (guna2Panel1.Size == guna2Panel1.MaximumSize)
             {
                 timer1.Stop();
             }
         }
         else
         {
             guna2Panel1.Width -= 100;
             if (guna2Panel1.Size == guna2Panel1.MinimumSize)
             {
                 
                 timer1.Stop();
             }
         }
    }
    private void moveRight_Click(object sender, EventArgs e)
    {
       timer1.Start();
       isCollapsed2 = !isCollapsed2;
    }
    private void moveRight_Click(object sender, EventArgs e)
    {
       timer1.Start();
       isCollapsed2 = !isCollapsed2;
    }
}

Issue Summary:

I'm working on a WinForms application using the Guna UI 2 library. I have a collapsible left side menu (Panel) that expands/collapses using animation (Timer or Guna2Transition).

The problem:

• Controls anchored to the right (e.g., Anchor = Top | Right) jump or shift position unexpectedly when the menu panel width changes dynamically.
• This only happens during the animation (not when resizing instantly)

What I've tried so far:

Enabled WS_EX_COMPOSITED to reduce flickering → minor improvement, but controls still jump.

Removed Anchor Right → eliminates the jumping but breaks responsive layout.

Tried SuspendLayout() / ResumeLayout() → no significant effect during animation.

Disabled animation completely → no glitch occurs.

Demo Video: Link to video showing the issue 📹 Demo Video https://youtu.be/a4vvf1kkZ8w

What I need help with:

• How can I prevent top-right anchored controls from jumping during animated width changes of the left panel?
• Is there an alternative to WS_EX_COMPOSITED to keep UI smooth and avoid anchor glitches?