Mapbox tiles not showing up on Binder in R

So I created an R notebook that creates Mapbox plot. My API key works, I can run the notebook locally and in a docker instance locally without issue, but when I deploy it via mybinder.org the tiles won’t show or show up as grey.

Does anyone know why this happens?

I have reached out to Mapbox and they don’t see a reason why this happens from their end.