Always-on ambient display removed from the OnePlus 6 after the first update
An update sent out by OnePlus removed the Always-on ambient display option from the OnePlus 6
Gone in a flash was the option to enable an Always-on ambient display on the OnePlus 6. The screenshot that you see on the right shows that this option was going to be a real choice on the handset before the update removed it. The other setting option, "Lift up display" is now the only choice that users have.
OnePlus has not commented on this, which has resulted in the birth of several theories. Some say that the Always-on ambient display ate through battery life like a warm knife goes through butter. Other say that it was just being tested (aside to major phone manufacturers; when you fail to make a statement about an issue with your device, it just creates theories that may or may not have anything to do with the truth). Hopefully, we will see the Always-on ambient display return in a future update.