OnePlus is one of the favourite smartphone makers of tech lovers because of its service, product quality, and performance. Following that, OnePlus has fixed some issues on the OnePlus 9 and 9 pro model through a software update. The Oxygen OS is one of the best custom OS based on Android; that always getting improved.
Recently, OnePlus has released the Oxygen OS 11.2.4.4 update for the OnePlus 9 and the OnePlus 9 Pro model. However, OnePlus is already pushing other system updates with the base number Oxygen OS 11.2.5.5 for these devices. The new software build comes with updated security patches, enhancements, and a few cameras fix.

The fresh system update for the OnePlus 9 and the OnePlus 9 Pro model appears as Oxygen OS 11.2.5.5. Foremost, this update provides the security patch level of May 2021.
Second, the new software build bears performance improvements- HDR effect in some shooting scenes, rear camera white balance performance, network communication strength, and Wi-Fi connection performance.
Yes, the Oxygen OS update also fixes the keyboard’s lagging problem and other known problems for better operating system assurance.