Podcast station keeps dropping a program

I use the podcast playlist ("station") feature all the time. For some reason, "Gilbert Gottfried's Amazing Colossal Podcast" keeps dropping off the station. I open the settings, select the podcast (which I am subscribed to, of course) and save my choices. When I open the station a day or two later, the podcast is gone and I have to add it all over again. This does not happen with any other podcasts.

Win 7 64bit. 8gb RAM. 320GHz i5 core CPU.