Just a couple of days ago, OnePlus started rolling out a new OxygenOS Open beta update for the OnePlus 5, 5T, OnePlus 6, and 6T devices. This brings several new changes and bug fixes along with various adjustments.
Today, OnePlus has stopped the Open Beta update 24/26 for the Oneplus 5 / 5T. Currently, the exact details about the sudden stop are unclear, but the company has cited some critical issues.
Yesterday, Manu J, the company's global product operations manager, addressed the OnePlus community and informed users about the latest development. You are rating it as a precautionary step to prevent any problems from spreading on the devices. In detail, this is what he said:
Hello everyone.
Due to a critical issue reported in the OnePlus 5 and 5T open beta builds, we are pausing the OTA release for now as a precautionary step to ensure that the open beta is well prepared… thank you.
Updates from OxygenOS Open Beta 12 and 4 for the OnePlus 6 and 6T are still rolling out without any issues. Open Beta 12 and 4 carry various optimizations for a screenshot feature. It also supports the world clock with improved weather information. The new version allows users to quickly reply to messages from the notification bar while in landscape mode.
OnePlus has not given a specific time on when the Open Beta update will resume for the OnePlus 5 and 5T devices, and there is no indication in the recent response to the OnePlus community regarding the resumption of it.
Additionally, the OnePlus 5 and 5T received the Android 9.0 Pie update a couple of weeks ago. After the update, many users report they have complained of various problems and bugs on the phones. It looks like this pair is having a hard time with the latest updates.
(Source)