radfel , via OnePlus 6T , Oct 14, 2021 : I recently upgraded my OOS from 10.x to 11.1.1 (I didn't receive a 11.0.x update for some reason). Now the whole system is very slow. Each application opens (sometimes much!) slower than it used to. Today I even noticed it using Android Auto, which used to work smoothly in my car. Sometimes it takes up to few seconds (!) for a button in a random app to react. I can see the tap happened, but the reaction for it is slow, like if suddenly there was not enough computing power on the device, which clearly isn't the case. What can I do to make the OOS 11 run fast on my OP 6T?