Lag in MIUI


Jul 12, 2021
I have an issue,2 days ago i updated to MIUI but there are 2 problems,1.when i watch YouTube videos and the video is playing if i drag the notification bar it's laggy but if i pause the video it's smooth again and also the battery it's charging a Little bit slower,and it's sometime laggier than before I have a Xiaomi Redmi note 9.Does anyone know how can i fix this?
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