Whaitiri remains the co-chair of Labour's Māori caucus.
Her co-chair, Willie Jackson, said: "We don't leak nothing, and all this rubbish that Paula Bennett has been putting out is just nonsensical because there is a process in place and we respect that process and that's that."
Jackson said he was not aware of any outcome from the inquiry yet, but Whaitiri maintained the support of the Māori caucus.
"We've been clear that she is the co-chair, we've said that from the start and we're standing by that," he said.
Rino Tirikatene said the Maori caucus understood there was a process to go through.
"For the time-being we've always been working together as a Māori caucus."
He had no knowledge of any leak to National and said he wouldn't expect that to occur.
Prime Minister Jacinda Ardern has previously said the inquiry was expected to take between two to three weeks.
Whaitiri stood aside from her portfolios of Customs, Associate Agriculture, Associate Crown Maori Relations, Associate Forestry and Associate Local Government after the alleged incident.