Stacked y-axis with multiple y-axis in one row

Hello,

i have a question concerning a chart with stacked y-axes. As you can see in the first picture (stacked.png) i have a chart with three y-axes and each axis is stacked. What i like to do is to combine for example two axes (e.g. Ch0 and Ch1) and stack those two axes over another axis (Ch2).

However the axes (Ch0 and Ch1) are overlaid as you can see in my picture (overlaid.png). Instead i would like to have the same view for Ch0 and Ch1 like in the not stacked picture (not_stacked.png).

The surface should look like this:

Ch0 Ch1
Ch2

How can i achieve this?

Best regards
Alexander