Customized Visual interactions work for a while and then change back to default "highlight" behavour

Within a report we have two charts : -one donut chart displaying geographies zones -one column chart displaying countries we define in the report a visual interaction between the charts: donut chart "filter" data in the column chart. It works well during sometime. And then after a while we notice that the behaviour has been changed back to the "Higlight visual interaction. Please fix this.