BackgroundWorker feedback from another thread

Hi everyone,

within a custom component (code below) I am creating a BackgroundWorker object to run an application (open Notepad) on a different thread to avoid freezing Grasshopper's UI. Everything seems to work fine but I'm currently encountering two bugs:

1. the output - DA.SetData(0, "Doing stuff"); - is not automatically refreshed when I assign it the new value from within worker_DoWork

2. if I inspect the output message with a panel it displays two branches, as if it had created a tree structure (see picture)

Can anyone provide me the missing piece of the puzzle? Thanks!

Code:

protected override void SolveInstance(IGH_DataAccess DA)
        {
            bool run = false;
            DA.GetData(0, ref run);
            DA.SetData(0, "Idle");
            
            if (run)
            {
                BackgroundWorker worker = new BackgroundWorker();
                worker.DoWork += (obj, e) => worker_DoWork(obj, e, ref DA);
                worker.RunWorkerCompleted += (obj, e) => worker_RunWorkerCompleted(obj, e, ref DA);
                worker.RunWorkerAsync();
            }
        }



private static void worker_DoWork(object sender, DoWorkEventArgs e, ref IGH_DataAccess DA)
        {
            System.Diagnostics.ProcessStartInfo psi = new System.Diagnostics.ProcessStartInfo("notepad");
            System.Diagnostics.Process p = new System.Diagnostics.Process();
            p.StartInfo = psi;

            p.EnableRaisingEvents = true;
            p.Start();
            
            DA.SetData(0, "Doing stuff");
            while (!p.HasExited)
            {
                System.Threading.Thread.Sleep(100);
            }
        }



private static void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e, ref IGH_DataAccess DA)
        {
            DA.SetData(0, "Done!");
        }