This seems to be in line with previous reports that indicate that the iPhone X will be hard to get on launch day for those who don’t move quickly. It is unclear as to what is causing the production issues because there have been multiple reports suggesting all sorts of things, like the TrueDepth cameras, the OLED display, the metal frame for the phone, and so on.
More recently analyst Ming-Chi Kuo has suggested that one of the “biggest hurdles” for the iPhone X is the flexible printed circuit board for the antenna system. Apparently special materials, processes, and stringent tests are required for Apple to sign off on it, which could explain why production is taking longer than normal.
However the semi-good news is that according to Kuo, these issues are expected to be improved upon drastically across November, which means that Apple should be able to ramp up production after that. Either way we’ll have to wait and see how this one plays out, but if you’re thinking about getting the iPhone X, you definitely want to pre-order it when it becomes available.