Sitemap Links Not Displaying Correctly

Hello, so I ran into a problem, this happened once before and i was able to fix it, but once again it came back and cannot.

I am using the Arne Brachhold sitemap, and when I look at my links, they are not displaying correctly. Links to my pages look like this normally: https://bikereviews.com/bmx-bikes/haro/2010-haro/haro-x1-bmx-bike/

But that same link in the sitemap displays like this: https://bikereviews.com//haro-x1-bmx-bike/ and even when you hover over it its the same. How can I fix it so it will display the full link?

Just to let you know, I have rebuild the sitemap twice, and nothing has changed.