Grid disapearing with chrome 29

[Deleted user]

I just updated my chrome to version 29.0.1547.57 m and the grid component disapeared.

I don't know if it can help but when I modify this rule :

.x-layout-box.x-vertical > .x-layout-box-item.x-flexed
{
min-height: 0 !important;
}

with min-height: 100% !important; , the grid reaper but the size is fixed and not good for other grids.

When I change attribute 'flex' by 'height', the grid reaper.