Advanced XML pie JSChart not showing

Hello Splunkers!

I'm trying to add a pie chart to one complicated dashboard, I have reduced the minimum non-working example to this:

<view template="dashboard.html">
    <module name="HiddenSearch" autoRun="True">
        <param name="search">dvc="192.6.1.249" | stats count by src_ip</param>
        <param name="earliest">-15m</param>
        <param name="latest">now</param>
        <module name="HiddenChartFormatter">
            <param name="charting.chart">pie</param>
                <module name="JSChart" layoutPanel="panel_row1_col1">
                <param name="width">100%</param>
            </module>
        </module>
    </module>
</view>

I can't spot the error, the search is returning correct results and if I create a simple XML with the same parameters it shows up nicely. Can anyone spot whats wrong here?