SIN Minimum Connect Time
 

Does anyone know the minimum connect time from EY to MH in Singapore? I thought it was 60 minutes. But yesterday I tried to change routing on an AA booked award ticket to an itinerary that involved a 60 minute connection in SIN. They called me back a couple of hours later and left a voicemail to tell me the 60 minute connection was invalid and they were reverting back to my original itinerary.