In Power BI, the interaction between different charts on the same tab (page) gets intrinsically defined by some settings. Selecting a particular bar in a chart can change the focus of other components in a report. Here are a few reasons why this can occur:
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Cross Filtering: In Power BI, action on one chart will usually filter the data on other charts.
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Interactive Nature of Power BI: Power BI reports are designed to be highly interactive, meaning a selection on one visual often affects others.
Please consider these behaviors are customized to some extent on each page to provide actionability based on the type of data displayed.
Filters remove all but the data you want to focus on. In general, highlighting isn't filtering. In most visuals, highlighting doesn't remove the unrelated data. Instead, it highlights the related data. The rest of the data remains visible but dimmed.