OnePlus have just started the
Open Beta 21 &
13 OTA roll out for the
OnePlus 6 &
6T to test new features and fixes that may or may not, come to future firmware updates. You will only receive this test firmware OTA if you are already on their Open Beta releases.
Changelog 
Android Security patch is still
June 2019
Camera version is still
3.0.42
This is the
13th Open Beta release for the
6T in
176 days = 1 update, on average, every 14 days.
(N.B. Open Beta is NOT available for the
T-Mobile (USA) carrier minority variant firmware)
OnePlus have just started the Open Beta 21 & 13 OTA roll out for the OnePlus 6 & 6T to test new features and fixes that may or may not, come to future firmware updates. You will only receive this test firmware OTA if you are already on their Open Beta releases.
