The new card Darksteel Garrison gives another support the ability Resilient. I see the icon for Resilient appear on the other support, but it has no effect: when that support was matched by swap, the shield went from 2 to 1. On another occasion it went from 1 to 0 and got destroyed, but I don’t remember whether supports that natively have Resilient do that too.
i tried it today and it’s working. maybe it was fixed or it’s an intermittent problem.