They think it's to do with the dramatic showdown between Rosie and Adam which dominated last night's episode.
Taking Adam down a peg in full view of the other Islanders, Rosie gave her partner the opportunity to come clean, but when he claimed not to know what she was "on about", she took matters into her own hands.
A spokesperson for the show told Mirror Online: "We're not saying anything further at this point".
One of this year's favourite Love Island contenders, Niall, has left the series, ITV has confirmed.
A source told The Sun: "We don't know what's gone on and we haven't spoken to him so we're in the dark".
Another friend added, "We just found out when it came on the press".
"We are as shocked as everyone else is".
Hardcore fans have been sharing their thoughts on Twitter and while it's probably just the usual speculation that occurs when a contestant exits a reality show without warning, fans are intrigued nonetheless.
"He is really popular as he's a lovely boy".
What will happen on Love Island next?
In Monday's episode, new girl Megan invited Niall on a date, leaving Georgia "fuming" at having to share her man.
This week it will be up to the girls to decide who they would like to couple up with.
Magazine reports, it is now unclear whether Niall has taken back control of his social media accounts, as the Islanders' families and friends usually run them while they are starring on the reality dating show.
Obviously I was coupled up with him so obviously I came closer to him than most people in here but it wasn't just that.
All Love Island couples could be forced to recouple on Tuesday night - hours after Niall Aslam's shocking exit was revealed.
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