I have a matrix style visualization with 19 fields in the Rows visualization (i.e. levels in the drill-down hierarchy). It works fine in the developer mode (Workspaces > [select workspace] > [reports tab] > [select the report] > [select the report page or tab]), but when published as part of an App, when you drill down to the last 3 levels of the hierarchy, the vertical scroll bar stops working. You can slide the scroll bar, but the data in the matrix doesn't move with it. There is no spinning pinwheel indicating the system is "working on it" or similar.
In addition, there are also 19 columns of data in the matrix. The only way to see all 19 columns is to narrow-up the columns sufficiently so they are all visible on your screen. There is no horizontal scrollbar regardless of what level of the hierarchy you are drilled-down to.