My M31 phone is freezing and then restarting. Some times it is not come out from booting loop.All are happening after Sep'2021 update for me. It is completely software update problem.I don't know how Samsung released the updates without crash test...
Don't give childish answer as every one follow these steps themselves.It will be better if you provide update for this fix as it's started only after Sep'2021 update. And test the updates properly before releasing that in case if you didn't released ...