Hmmm... This sounds like a tricky one.
So you are reducing the data to the bookmark selection via the Publisher task?
And after that task runs, you can open the Dashboard, see that the data is reduced as expected, and access the report as you want (i.e. you can drill in to view the chart as you want)?
As I recall, there was a general issue with QlikView in saving the "fast change" state of a chart.
My recommendation would be to copy that chart and modify it to be how you want it (straight table w/ appropriate dimensions instead of a drill) and use that in the report. Workarounds like this a bit disappointing, but that should be a quick exercise.