One ui 3.0 with android 11 . 

My a50s has wifi signal dropping everytime .I connected other phones and they dont have any kind of such issues .This lag or signal drop happens for 2 to 3 seconds then reconnects as normal,but occurs frequently.

There is no preview of messages in notification . It shows only new message. How to enable preview of messages ? Problem came after the update.

Eventhough i am using samsung charger for charging, still a message popup saying to use samsung charger. What the hell is that?

Wallpaper services : glance on samsung Shows you stories of your interest in lockscreen. Enable or disable as you wish.Did you notice anything else?