Set IsThreeState property to true and choose ToggleState to Indeterminate.

Office2019Dark:

Office2019Light:

1. Group by some column or create hierarchy.
2. Select all from the parent header check box or in the header.
3. Expand parent row
4. As a result, the row expands, but selection disappears.

When I update to version 2024.3.806 I get a build error :

How to reproduce: Create a DPI-aware application and run it on a Windows 10 machine on 125%, the text inside the editors is smaller compared to the text in cells which are not in edit mode.

Workaround: 
private void RadGridView1_CellEditorInitialized(object sender, GridViewCellEventArgs e)
{
    BaseInputEditor editor = e.ActiveEditor as BaseInputEditor;

    if (editor != null)
    {
        RadTextBoxItem item = editor.EditorElement.FindDescendant<RadTextBoxItem>();

        if (item != null)
        {
            item.HostedControl.Font = this.radGridView1.GridViewElement.GetScaledFont(this.radGridView1.GridViewElement.DpiScaleFactor.Height);
        }
    }
} 

Repro-steps:

1. Create a RadTreeView
2. Set the TreeViewElement.ExpandTimerInterval to 5 seconds.
3. Enable drag/drop.
4. Fill the tree with random nodes and childnodes
5. Drag a node over other nodes. Make sure you do not hover longer than 5 seconds over a single node. So just move around.

Observed behavior:

1. After 5 seconds the node you are just hovering over, is expanding.

Expected behavior:

1. No node will automatically expand. Every time a new node is hovered over, the timer will reset.

Load-On-Demand self-reference hierarchy provider