legends disapearing when i'm using colors by expression by measures in combo charts

[Willcoda]

Hi everyone,

I have some issues with legends in combo charts.
When i try to add cutom colors by expression for each measures, the legend linked to it just disapear.

Is it a bug ? or maybe am I using it wrong ?

[Alan_Slaughter]

Could you please share a qvf to demonstrate your issue?