1. Open attached "COI_copy1.aln".
2. Select some rows in the region 6-8 (inclusive).
3. Start to drag'n'drop the selected region (just press the mouse on it).
4. Move the mouse to the right rapidly and return the mouse to the left (do not release the button).
Expected: the mouse cursor is on the selected region.
Actual: the mouse cursor is out of selected region.