I am having the same issue, I get notifications for the flatmate listings I am following, but for some reason I can't receive notifications for the rental searched I am following. I've deleted, reset and refollowed the searches I want notifications for countless times but still can't get them to work... I manually look each day so I know with certainty there are new daily listings! I was able to get them a few years ago, so I'm not sure why I can't now...