A few days ago OnePlus started sending out a new update for three of its 2019 smartphones, the OnePlus 7, 7 Pro, and 7T Pro. Notably absent from the list was the 7T, which for some reason saw a delayed rollout of what is basically the same update. Now though it is finally going out to OnePlus 7T units in the wild, arriving as OxygenOS 10.0.8 globally and OxygenOS 10.3.1 in India. Once you install this, you'll have the January 2020 security patch level, which is soon to be two months behind, but that's par for the course for OnePlus. The changelog mentions RAM management...
Source: https://www.gsmarena.com/new_oxygenos_update_finally_reaches_the_oneplus_7t_with_january_security_patch-news-41613.php