QGIS en WFS caching

The dutch PDOK-services plugin is a simple plugin to load some national (PDOK) dataservices.
One of the available services is a Web Features Service (WFS), while a very handy service, calling the WFS service to load all roads in the Netherlands shows you the following result:

As you can see the blue bar are actually all the (road) features that you receive. This (rather) strange result is also what you get when you zoomed in to a much smaller area. One would expect that the features would be retrieved only within current Extent/BoundingBox, but QGIS show exact the same ‘bar’ of features.
But we/QGIS can make this work…
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