Active grid element overflowing grid area

[zerobyzero]

I'm creating a new grid theme and the selected item is overflowing the gamegrid area during the animations when the grid needs to add new elements at the top or at the bottom. Only the selected item overflows the indicated area.

The relevant part of the theme is this:

    <imagegrid name="gamegrid">
        <gameImage>./_inc/images/grid_tile_noimage.png</gameImage>          <!-- Default image when roms don't have an image defined -->            
        <margin>0.012500 0.022222</margin>                                  <!-- Margin between "cells" 24x24 pixels -->
        <padding>0.0 0.0</padding>
        <pos>0.085417 0.227778</pos> <!-- 164, 246 -->  
        <size>0.916667 0.577</size>
    </imagegrid>

In the following screenshot you can clearly see how the non-selected grid elements are properly clipped by the defined imagegrid region at the top and at the bottom while the selected item is overflowing that area.

The issue only happens during the animation, when the grid is fixed, everything looks as it should:

Do you happen to know how to fix the issue? Is this an ES bug?

Regards and many thanks in advance.

[mitu]

Seems to be an EmulationStation bug.