Android 11 3.1 upgrade error in wifi networks

[Nitin060383]

I have updated my Galaxy M31 and M21 

Update received android 11 3.1 core

All update are upto the marks

But there is somthing error in wifi network availability 

It doesn't show properly after this update esrlier it was workong fine and greart

Infact i have checked in my laptop and other brnad phones too One Plus 8 it works properly as it was earlier 

But in my samsung M21 and M31 some wifi netowkr not available or either its connect or not connected or either sometime it shows my another dual band name bht get coonect to single band

[Ehsank]

go to settings >general Management >reset >reset network and observe

[Nitin060383]

done but issue not resolved

[Ehsank]

once Forget all WIFI devices which were connected earlier.
Again turn on WIFI> Scan> and try to connect.

[Chirag2003]

When You have received one ui 3.1 core in galaxy m21...?

[prashantanp955]

when you receive one ui 3.1 update in galaxy m21?

[Nitin060383]

oppps m31 android 11 3.1 core
m21 android 11 3.0