How to use union in area queries (QL/XML) with Overpass API/OpenStreetMaps?

I am using area queries to find nodes with particular amenities Eg:-

[out:json]; 

area[name = "New York"]; 
node(area)[amenity=bar]; 
out; 

However the issue with this is that if I query the following:

[out:json]; 
area[name = "New York"]; 
(   
  node(area)[amenity=bar];
  node(area)[amenity=restaurant]; 

); 
out; 

The output includes only the first amenity, i.e. 'bar' even though there's a union. If I reverse the order to put 'restaurant' before 'bar' the output includes only restaurants. I also tried the same using XML syntax but in vain. Any ideas?