For the past few weeks, about six photos and videos of swollen iPhone 8 and 8 Plus phones - some of which were split in the backside and exposed internal parts - have been shared widely on social media.
Originally, a single user in Japan experienced this issue after leaving their phone to charge overnight using the official Apple charger.
There was no sign of scorching or an explosion, meaning that the phone was like this before the device was plugged into the wall outlet.
Apple said it's looking into the matter and won't comment further pending a full investigation.
Apple's iPhone 8 Plus battery swelling issues just won't seem to go away.
The first of these issues was recorded in Taiwan by a woman who purchased a 64GB iPhone 8 Plus in rose gold shortly after the phone was released just one week ago.
Via ThePaper.cn, Liu reportedly took delivery of an iPhone 8 Plus on Thursday only to find that its case was split as soon as he opened up the packaging.
Apple has stated that they are "aware (of the issue) and are looking into it". The most likely resolution is that Apple changes something silently on the supply chain side to stop new devices from being produced with this fault.
It is not the first time the iPhone has faced battery problems.
Apple Inc. shares fell $0.33 (-0.21%) in premarket trading Friday.
Some analysts have said that consumers may be holding off on the iPhone 8 and waiting for the iPhone X instead, which will be available for pre-order on October 27.