Lowering Opacity in Multi-Fill Effect (appearance panel)

[evtonic3]

I can't seem to individually lower the opacity of a certain fill in multi-fill effect I've created using the appearance panel. Is this a bug?

[firstdefence]

Blue fill over a red fill dropping the opacity to make a plum colour.

[evtonic3]

One thing I didn't mention on my fills, the one I can't lower the opacity is a bitmap fill. If I switch over to a standard swatch I can lower the opacity.

[Rudolphus]

I have the same issue even with latest version 2.1.

Any opacity changes of a bitmap fill/stroke have no effect at all. And when I select another fill or stroke in the panel and then return back to the bitmap fill with previously changed opacity it is set back to 100%.

There is another issue: after changing opacity of a bitmap fill/stroke in Appearance panel you can't change opacity of any fill/stroke of the object. 

[evtonic3]

There is a youtube video where the creator said that the only way to have any transparency/opacity on a bitmap fill in the appearance panel, is to make bring in a texture with opacity already applied.