About a month ago, Strava changed the Personal Heatmap feature. It has always been one of my favorite features of the app and one of the main reasons I'm willing to pay for an annual subscription.
Since the update, the Personal Heatmap has become barely visible, making it almost completely unusable. As a result, a feature that was once extremely valuable is now effectively useless.
Routes only become somewhat visible if I have completed them multiple times. However, if I climb a summit or hike a trail just once, it often doesn't appear on the Personal Heatmap at all. Before this change, the feature worked brilliantly and provided a clear visual record of where I had been. Now, it is a major disappointment.
You can barely notice the Personal Heatmap in this example—it runs from the far right side of the screen all the way to the far left:
