According to reports, the OnePlus 7 and 7T series of smartphones are reportedly receiving a second OxygenOS update in October, that keeps the already released September security patch, but fixes some bugs. While Indian variants seem to retain pretty much the same changelog as the preivious update, there are some changes to the EU variant, like bug fixes for the alarm clock and stability issues with the Messages app. It's worth noting that the OnePlus is yet to update the security patch for either series, which still carry the September security patch.