FLErrorRange inversion ?

[mc59fr]

I tried to implement sample #13 kind of chart with version 1.1.1 of the library.
I get an inversion of the draw

my plots :
FlSpot(
index,
(100*stats.avg).round().toDouble()/100,
yError: FlErrorRange(
lowerBy: (stats.avg - stats.min),
upperBy: (stats.max - stats.avg),
),
);