When the "Flexgate" issue with the display of the 2016 MacBook Pro models and later reared its ugly head last year, Apple refused to acknowledge the problem. In a nutshell, the display on those laptop models produced what was dubbed as "stage light effect" or irregular lighting at the bottom of the screen, which was blamed by repair site iFixit on the use of fragile flex cables connecting the display with its controller board.
This design - apparently part of an attempt to minimize space and produce even thinner laptops - eventually wore down the flex cables after a long period of opening and closing the display, thus the uneven screen lighting. Thankfully, the problem may have been fixed at least for the 2018 models of the MacBook Pro, as reported by iFixit.
According to the site, Apple appears to have quietly addressed the Flexgate issue by using a longer flex cable on the latest models of the MacBook Pro announced in July 2018. For comparison, here's a photo of the flex cable used on the 2016 model:
For the 2018 models, Apple extended the cable's length by 2mm, as spotted by a MacRumors reader on a 13-inch MacBook Pro and corroborated by iFixit itself, which observed the same change with its 15-inch model.
The longer flex cable means more space for it to survive instances of closing and opening of the laptop's display. However, Apple remains silent on the issue and whether this change in the flex cable's length is part of a fix.