Previously, some users of social media and MacRumors forums claimed that their iPad Pro was slightly bent without any improper use or any unusual pressure. Some people think its a gradual process in daily use, or its the result of putting the iPad Pro in a backpack.
Apple now says that the metal and plastic parts of the iPad Pro are prone to bending when they are cooled in the manufacturing process, and a similar situation may exist in both 11-inch and 12.9-inch new iPad Pros. But Apple says this should not be seen as a defect because most tablets, whether Apple or other companies, are thin and easily bent.
Apple also said that so far, the return rate of the iPad Pro in 2018 has not exceeded its normal level, and that concerns about the rigidity of the structure of the iPad Pro are unfounded, which is by no means a repeat of the controversy surrounding the bendgate of the iPhone 6Plus. In 2014, Apple opened its product testing facilities to the media due to the flexibility of the iPhone 6Plus and switched to a more robust aluminium fuselage for the next generation of the iPhone. (small)
Source: Responsible Editor of Netease Science and Technology Report: Wang Fengzhi_NT2541