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Featured Image Credit: ITV
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However, Shannon's speedy departure led to many Love Island fans speculating the glamour model was going to be returning later in the series as a surprise bombshell.
But sadly, it seems the 22-year-old former glamour model really is back in the UK after her brief cameo in the villa, as Shannon has since started writing on her Instagram page again.
Sharing a picture tagged as being in London, United Kingdom, Shannon wrote: "I'M BACK EVERYONE! Cannot believe the amount of support I've received, I love every single one of you!
"Thank you for my best friend for life for running my socials while I was away. Gutted but SO grateful for the opportunity."
Speaking about the trolling some Islanders have received since appearing on the show, Shannon added: "Everyone please #bekind."
Fans were quick to say they were sorry to see she'd left the show, with one person commenting: "It's so sad you left. But keep shinning babes."
Another said: "You deserved to stay longer."
While a third added: "What happened to you is so unfair! Hope they put you back in."
ITV declined to comment on speculation that Shannon will be returning to the villa. Tyla has also contacted Shannon for comment.
Shannon's call to #BeKind comes after Chloe's family issued a plea for trolls to back down, following her arrival as a bombshell in the villa.
"This morning we woke up to yet another DM encouraging Chloe to kill herself - there have been hundreds," family wrote on Chloe's Instagram.
"Not only that, but people are flooding her inbox threatening to kill her themselves. People... this is a game show, there is a cash prize!"
ITV also issued a stern warning to viewers to watch what they say about contestants appearing on the programme.
"We want Love Island to be a positive experience for all of our cast and their friends and family members," a statement read.
"Last night's episode created strong reactions but some viewers' posts were wholly unacceptable."
The statement continued: "We take these matters extremely seriously and will support cast members and their families in reporting such posts.
"We would once again urge all of our viewers to think before posting, and remember that our Islanders are people with feelings."
Love Island continues weeknights at 9pm on ITV2.