I noticed that with my favourite option ('Grid|Highlight focused cell') disabled, when dragging (top-level) items upwards in the grid, there is a slight glitch that produces a selection of two items after the drag operation rather than no item being selected / highlighted. To reproduce:

1. Drag up on an item moving the mouse pointer only a few millimeters so that the horizontal red drag indicator will show but that the item won't actually be moved as it will be dropped back in the same position when releasing the mouse button. The result is a selection of the dragged item and the item above it.

2. The same will happen when dragging up to a higher position and moving the mouse pointer to just above the horizontal red drop indicator (but not so far that it will be repositioned). If the pointer is below the indicator when releasing the mouse button, there is no problem, but when the cursor is just above it, the two items will again be selected.

 

Cheers