If rogue attack twice from multi attack, does the uncanny dodge works only on the 1st?

@JeremyECrawford if a rogue is attack twice from multi attack, does the uncanny dodge works only on the 1st or 2nd attack or all total?

— Ken M. Wms (@Kineteken) June 12, 2017

You use Uncanny Dodge in response to an attack, and it works only against that attack, not against other attacks in the same turn. #DnD https://t.co/h7dqw3eI3U

— Jeremy Crawford (@JeremyECrawford) June 12, 2017