AccordionItem color not work on Android

[Tungsteno74]

This code not work as expected on Android devices:

<AccordionItem>
	color: .55,.5,.95,.25
	background_normal: 'assets/button_normal.png'
	background_selected: 'assets/button_down.png'

The image below is how it appears on Android devices:

Instead this image is as looks on Windows/Linux (correct):

After several try and tests i found a partial fix for this problem:

[AccordionItemTitle@Label]:
    text: ctx.title
    canvas.before:
        Color:
            rgba: 
                #the fix part
                ctx.item.color \
		if ctx.item.color \
		else (1,1,1,1)
                ###
        BorderImage:
            source:
                ctx.item.background_normal \
                if ctx.item.collapse \
                else ctx.item.background_selected
            pos: self.pos
            size: self.size
        PushMatrix
        Translate:
            xy: self.center_x, self.center_y
        Rotate:
            angle: 90 if ctx.item.orientation == 'horizontal' else 0
            axis: 0, 0, 1
        Translate:
            xy: -self.center_x, -self.center_y
    canvas.after:
        PopMatrix

This fix works for all systems (and also with the object set as disabled) but, if i remove the color propriety from the AccorditionItem the program crash. Thus i'm not able to fix that completely.
I also tried to include this improvement in style.kv file located in kivy/data, but with no positive results.

Someone else has encountered the same problem?

thanks

---

tested with:
android 4.4.2
kivy 1.9.1 stable

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