The soap actress has threatened to quit if she keeps being voted by the public to take part in bushtucker trials. She was chosen to take on her third in as many days on Tuesday's show.
Hosts Ant & Dec are said to have "lost patience" with the star, as she reportedly takes "ages" filming the challenges.
Get Me Out of Here Now! host Laura Whitmore told The Sun: "Viewers saw two minutes of Helen doing the trial. But in reality the filming took ages.
"The film I saw was half-an-hour long and that had been seriously edited. She was moaning about everything and kept changing her mind.
"She will be a nightmare if she is voted to do the live trials, because they have to be done to time. She'll just have to be made to do it."
Whitmore added: "Ant & Dec have lost patience with her and I think most of the crew hate her since she bailed out of the Bug Burial Trial. Months of preparation, health and safety checks and testing goes into those trials. One lady even has to count every single insect used.
"So to do all that and have Helen walk away after just ten seconds is annoying."
She also suggested that Flanagan's threat to quit was in order to gain sympathy from the public, saying: "Helen was never going to walk off. She was just saying it for someone else to say, 'No, stay'. It was attention-seeking."
Flanagan takes on the Cruelty Towers challenge on tonight's show, which will see her navigating her way through a 'hotel' full of animal guests including snakes, a crocodile, an ostrich and spiders.
I'm a Celebrity continues tonight (November 15) at 8.30pm on ITV1.