We checked this issue from our side, and it seems okay. Please provide more details regarding this issue (e.g., your actions step by step with screenshots, etc.). This will help us to reproduce and resolve the issue faster.
After doing some more testing I think I figured out what the issue was. Without the Geolocation plugin, related listings are selected based on category. When geolocation plugin is active, they are selected by category AND location. I just didn’t have any listings in the same location.