OnePlus 6 is one of the most interesting devices on market with amazing specification especially considering its price. However, people found a big problem connected with security of phone. Most of devices has locked bootloader, and such a state of affairs prevents users from installing modified images of system. Some users from XDA forum found some issues with bootloader in OnePlus 6.
How it turns out OnePlus 6 allowed for installing modified images of system even with blocked bootloader, and it was dangerous for user's data. OnePlus quickly solved this problem, and after downloading new update of OxygenOS system to 5.1.7 version this problem is solved. Apart from solving problem with bootloader new update adds some system improvements and fixes some bugs like problem with the schedule setting of Do Not Disturb.