Datagrid row and column dimensions does not correspond to what is visualized

[magentile]

When clicking on a cell of a datagrid with many columns and/or rows we noticed that the wrong cell is selected (tipically the cell to the left on the same row or the cell above in the same column).
This happens also when the datagrid is draggable: if you try to drag a row, it happens that you actually select the above row.

Let me know if you require any information to investigate on this.

Thanks!