OnePlus began rolling out the Oxygen OS 3.2 update for the OnePlus 3 three days ago, but halted the new firmware just a day later. The awaited update was supposed to bring sRGB display mode, better RAM management, among other fixes, but was pulled out due to undisclosed issues. Lots of people got the 3.2 update though and managed to update safely, but there were some with issues while upgrading. Anyway, OnePlus is now seeding the Oxygen 3.2.1 update, which in addition to the 3.2 features, comes with a few more fixes. If you got the 3.2 update on your OnePlus 3, then this OTA update...
Source: http://www.gsmarena.com/oneplus_resumes_the_oneplus_3_update_oxygen_321_seeding_now-news-19267.php
