Brother try a force reboot this will help you to solve this problem. After it clear the cache of your poco launcher app.
[link|https://howtofixgadgets.com/poco-reboot-problem-solution/|https://howtofixgadgets.com/poco-reboot-problem-solution/|new_window=true]
This will help you to do step by step.
I was having the problem in my poco f1 but now i have successfully solved this problem.