I have spent the past three days going crazy over this. I have explored every single menu item to try and fix this. I have reinstalled the maps on the device and still no luck. I have changed the detail, etc, etc.
I am planning a trip and when reviewing the waypoints I did on BaseCamp, I noticed that the stream wasn't showing (I am planning a canyoneering trip). I need to follow an intermittent stream first that drains into the main canyon. Neither stream shows up on the map.
Here's the funny part. One of the first things I did with my eTrex was to go test it out in a local hike. That mountain has at least 4 intermittent streams throughout. Then, all those streams were showing. I know this for a fact because I am planning a trip on uncharted territory and I distinctly recall looking at it on my device and when placing the arrow over it it was labeled "intermittent stream" per the usual. This leads me to believe that it isn't necessarily a malfunction, but user error on my part. I must have done something in the settings but I can't find what!
One more note, I have the TOPO U.S. 24K West maps installed. I'll also add that when I saw the streams, I was using an old version of BaseCamp, like 2.1 or something. I have the most current one now, so I am not sure if that can be it.