OnePlus has cancelled the global release of OxygenOS 5.0 for the OnePlus 5 due to an unspecified bug.
OnePlus says it is preparing OxygenOS 5.0.1 to resolve the problem. It expects to offer the tweaked code in a partial release in the near future.
Apart from bringing Android 8 Oreo to the OnePlus 5, OxygenOS 5.0.1 also adds the face unlock feature from OnePlus’ newer 5T flagship.