isochrones and urban obstacles

hi, I have a problem with isochrones related to railway stations. I think ORS does not consider the underpasses of the stations. If I place the center of the isochrone in the different platforms of the same station, the result is two different isochrones. Is there a way to have a single polygon?

Ha, these are the weirdest isochrones I’ve seen so far.

Please give 1-2 example URLs.

Can you confirm that there is actually an underpass mapped in OSM as I cannot see one in the OSM data?