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In case user does any selection at the page2 and moves to Page 1, filter values are getting persisted. In case user forgets to do the reset to default(Bookmark to clear selections) button the values in the selection persists. Want to reset to default when move from Page2 to Page1 and selects any other filter(without using reset button).
I don't think you can achieve it... there's no "OnEvent" paradigma in powerbi...
Closest thingh probably, you can make navigation available only trough buttons using bookmarks that save both current page and data (filters reset).