Kardashian, 29, appeared on the show to plug her new line of baby clothes. When Armytage asked about North West, the video feed went blank. Sunrise producers tweeted immediately afterward that Kardashian's "people" had "pulled the plug."
"I quite liked that girl before," Armytage said, telling viewers that the show had given Kardashian an opportunity to shill for her brand.
Kardashian immediately denied the accusations on Twitter.
"Why would I cut an interview short because of North? Get over your self Sunrise... The call dropped... stop reaching for a story," she wrote. "You are so f**king desperate!"
Sunrise producer Michael Pell maintained that Kardashian's PR team had stopped the interview.
"What happened with @khloekardashian on the show is a good lesson for publicists everywhere. Don't try to censor natural conversation," he tweeted.
Sunrise said on its website that "the abrupt ending of the interview is not consistent with a satellite drop out."