According to Britain's The Sun newspaper, the singer told Little Mix bosses back in 2019 that she wanted to leave the group, but was convinced to stay for their Confetti Tour.
The trek was originally due to take place in 2020 but was pushed to 2022 due to the COVID-19 pandemic.
However, in October 2020, Jesy told her bandmates that she was planning to leave - just weeks before she officially announced her exit - and threw Perrie's plans into disarray.
"This idea that everyone was happy in the band prior to Jesy leaving is a smokescreen," a source told the publication. "Perrie actually told the band she was thinking about leaving in 2019 which prompted a sit down with management."
"In the end, she agreed it wasn't the right time and they talked about the Confetti Tour which was delayed due to COVID - it was known that after the tour Perrie would bow out of the group."
"Then, in an October 2020 meeting, Jesy made it clear she was suffering and she felt like she couldn't continue. It didn't come out of the blue for the girls as Jesy suffered a panic attack live on Radio 1 just weeks before and it was Perrie who jumped in and covered her vocals."
When the issue of the tour came up again, Jesy apparently said she would do it as long as it wasn't delayed by the pandemic, "as she didn't think mentally she could cope with another year in the group.
"Things panned out differently as her mental health deteriorated and everyone thought it best to speed up plans," the source added.
News of Perrie's 2019 bid to leave Little Mix comes as it's been claimed the three remaining members of the group - Perrie, Leigh-Anne Pinnock, and Jade Thirlwall - will all pursue solo projects following the end of their tour next year.