Sorry I missed this. Yes that is the solution. It's not proven to be a very wise choice, but the module's default resizeMode is such that it tries to expand down to the bottom edge of the screen, and have a scrollbar for its own content. And to avoid then having two scrollbars right next to eachother, the module itself actually turns off the overall page scrollbar. By and large though, people using the module for the first time are normally very confused by this, just as you were here. Possibly it should be changed although it creates the need for a migration script... (changing the param default would disrupt backwards compatibility for folks whose pages expect it to behave the old way.)
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