Workaround: set a White back color to the control in the designer or use the attached custom theme

I can not add any type of control to the layoutControlGroupItem.  I have a screen recording of me trying to follow the procedure shown but it is 60M so I can't attach it.  I shared the file on my OneDrive if you would like to access it that way.

 

https://ryancentral-my.sharepoint.com/:v:/p/jeff_burke/EV_FvUkDAUtLlWgYelxCxeoB52z_0522xoFurCSQNa-dbw?e=s2WOe5

 

 

I am using a RadLayoutControl in one of my applications and suddenly it started to throw IndexOutOfRangeException while editing the layout both in the designer and at runtime.

I just found out that after removing the padding on the control it started working fine again. I had recently added padding to add some space between the layout and the docked command bar.

So it looks like the RadLayoutControl dos not like having padding. The exception was being thrown in Telerik.WinControls.UI.LayoutTree.GetDropTargetNode(DraggableLayoutControlItem dropTargetElement, Point mousePosition, Type dragContext)

For the time being, I will add an empty space at the top of the layout instead of using padding.

Hope it can help you resolve this bug.

It is possible to add one control, but when when you try to add other controls to the layout, just sits where you place it rather than split in to sections. 

Expected:

Actual:

 

In this particular case, we have a LayoutControlGroupItem inside a LayoutControlGroupItem. In the inner LayoutControlGroupItem, we place some controls. When collapsing the parent group and expanding it afterward, the control is not visible. We will need to collapse and expand the inner group to see that control.