Main Map not showing one category

Is there a maximum # of listings that will show on the main map? I have 4 categories and 3 show up when selected, but the one with 500+ listings shows nothing when selected.

My website: https://planestrainsandtreadmills.com/

Specifically: If I select “What To Eat” on the map, there should be 500+ restaurants all over the United States, but it doesn’t show anything. When I select any of the other categories (e.g., “Where to Stay” – the pins pop up.

Is there a way to make sure all the restaurant pins pop up when selected?

Thank you!!!