dhtmlxgrid: Drag-and-Drop doesn't work if nothing is in the

I noticed a problem with my drag-and-drop. If there is nothing in the grid, then the row I am trying to drag into the grid doesn’t create a “reference line” (the bold line that indicates where the row will appear). It also doesn’t even call the event I attached for onDrop. I know that it worked before, I am wondering what might I have changed to cause this to happen?

Thanks in advance!

Unfortunately the issue can’t be reconstructed locally. The d-n-d works for empty grid in all modes ( it may not show placement line in sibling mode, but it doesn’t affect d-n-d process )
If issue still occurs for you - please provide any kind of sample or demo link, where problem can be reconstructed.