Displaying custom defined Stream parameters as pn.Param not updating DynamicMap

Hi, I am getting to know the streams.Stream by using an example from http://holoviews.org/user_guide/Responding_to_Events.html
It seems to make sense to me to display the parameters of a custom ´Stream´ instance using pn.Param. But nothing happens in the DynamicMap on updates of the parameters. Only below, when i explicitly call an .event on the instance, the DynamicMap updates.

Wouldn’t it make sense to display and control the stream parameters using pn.Param()?