Solved! Go to Solution.
I too had this problem( NO GOOD LOCK INSTALLED) , i had updated my A70 to android 11, 2 weeks after its release. Since then till today morning i didnt have any issues, but i did notice that my phone behaved very strange when i plugged in the charger and used it. The screen would sometimes freeze while some actions were performed by itself (can also be bcz my cable is damaged). Today morning i saw that the notification bar was not extending at all. (The swipe anywhere on screen to extend had always been off, never used it. )
I saw that there was an update , security patch from April 1 2021, i just installed it and my notification bar worked normally! ISSUE STILL NOT RESOLVED
At first i thought it was resolved but i still am facing the problem. It is happening frequently and i have to activate the "pull down anywhere on the screen to use it but it doesn't work when i try to pull down the notification bar over any application . IT IS VERY MOODY !!