With the actual code, some computations are done in the graph renderer to determine if it is worth to show the "Stacked" button in the graph view control panel for the data on hand. It turns out that that problem is not satisfactorily addressed and is quite hard from a usability perspective. We prefer to restore the old behavior as long as we don't have better ideas. closes odoo/odoo#37188 Signed-off-by: VincentSchippefilt <VincentSchippefilt@users.noreply.github.com>