QChart with more than 1 AreaSeries ?

[Lila BRANDON]

Hello there !
I'm sorry to bother you with this problem that might be dumn but I can't seem to find a solution..

I'm currently making an Application that uses QList of doubles to make charts and such.
There is one chart that is supposed to have areas under each line looking like that :

However, I managed to make a chart with one AreaSeries, that made it look like this

But whenever and however I try to add a second AreaSeries, it makes the chart look like that :

I can't seem to find the issue, hopefully some of you knows how to help me..
Here is my code :
https://pastebin.com/CYkV9VH3

PS : The second AreaSeries also works when it's alone (without the first one). The issue only happens when I make two or more AreaSeries on the chart.
I'm using Qt 6.7 with C++

Thanks in advance for your help !
Have a nice day/night