Overwriting of default value not possible

Bug Reports
1

The overwriting of a default value of class property is not working if the default value is a class property:

<App>
    <Panel ux:Class="RoundLabel1" CircleColor="#333" CircleBorderColor="#000">
        <float4 ux:Property="CircleColor" />
        <float4 ux:Property="CircleBorderColor" />

        <Circle Color="{ReadProperty CircleColor}">
            <Stroke Width="5">
                <SolidColor Color="{ReadProperty CircleBorderColor}" />
            </Stroke>
        </Circle>
    </Panel>
    <Panel ux:Class="RoundLabel2" CircleColor="#333" CircleBorderColor="{ReadProperty CircleColor}">
        <float4 ux:Property="CircleColor" />
        <float4 ux:Property="CircleBorderColor" />

        <Circle Color="{ReadProperty CircleColor}">
            <Stroke Width="5">
                <SolidColor Color="{ReadProperty CircleBorderColor}" />
            </Stroke>
        </Circle>
    </Panel>
    <Grid>
        <RoundLabel1 CircleColor="#00F" CircleBorderColor="#0F0" Width="200"/>
        <RoundLabel2 CircleColor="#00F" CircleBorderColor="#0F0" Width="200"/>
    </Grid>
</App>

RoundLabel1 works as expected: border color turns into green, default color is black.
RoundLabel2 should behave in the same way, but it’s not. The difference here is that the default value points to a class property.

2

This appears to be related to a known issue with how property bindings are resolved. I’ll try to get more eyes on it.