The iPhone 8 was released on September 22 and is the first iPhone to have wireless charging technology but the issue only appears to occur when the phone is being charged with the regular lightning cord.
Although it's still early days, the problem seems to be very rare.
Apple has not said much about the apparent defect but a spokesperson said the company was aware of the reported incidences, and was looking into them.
It's not the first time the consumer tech giant has had issues with one of its new handset models. When the iPhone 6 was released in 2014 there were multiple reports of the phone being susceptible to bending, leading to the hashtag #bendgate trending on social media.
The splitting issue pales in comparison to the battery-related issue faced by Apple's main rival Samsung last year which was forced to recall the global stock of its Galaxy Note 7, costing the company about $7.2 billion.
Both the iPhone 7 and iPhone 7 Plus also had reports of exploding batteries but they were very isolated incidents which didn't prompt any recall.
The Next Web has previously shared unconfirmed reports that the battery used in the new iPhone 8 was built by the same manufacturer, Amperex Technology Limited, that made the battery for the Samsung Galaxy Note 7.
Apple's new premium model smartphone, The iPhone X, is due to be released on November 3.