mirrored_value for column graph option not working anymore

[freetom-git]

Hello,

I use the following configuration to display ET and raintotal value as mirrored column... It was working fine but for some time the columns have been stacked and not mirrored anymore...
I didn't recall making any big change leading to this result.

[[chart9]]
        title = Pluviométrie vs Evapotranspiration
        type = column
        aggregate_type = sum
        [[[rainTotal]]]
            stacking = normal
            name = Pluviométrie Total
            zIndex = 0
            color = "#438bd6"
        [[[ET]]]
            stacking = normal
            mirrored_value = true
            name = Evapotranspiration
            type = column
            aggregate_interval = 86400 # 1 day in seconds
            gapsize = 86400 #86400 1 day in seconds

I tried to remove the "stacking = normal" option and the columns are side by side which is better but not what i wanted to display in the first place.

Thanks for your insight