Only puny code shown in card, not IDN name


#1

I’ve noticed a link on my IDN domain name http://paradisefaçade.com/blog/2013/8/7/exercises-in-futility-part-repairing-permissions-is-useless (that’s a c with a cedilla) displays the correct IDN URL in the Twitter for iOS client, but it shows the incorrect puny code URL in the twitter card. Why is that? Is IDN just not supported in cards?