Chart Brushing does not work on additional Dashboard Subtabs
Finally got around to installing 9.5.1 and have some more info for you...it appears to be a similar issue to the one where elements were appearing on the wrong subtab. I created a dashboard with 4 subtabs and put the same 2 reports on each subtab, one with the brushing interaction enabled and the other with it disabled. On the first subtab, this worked perfectly...on every other subtab, the brushing interaction remained available even though it had been disabled in the widget options.
See video here