Wifi - Automatically disconnect after 10-30 sec

[Siddhharth]

What i already tried -

1. Reset wifi settings 

2. Router settings 

3. Disabled automatic search for better network 

4. Switch to mobile data 

So i already have tried all of these solutions but its not working. everytime i have to restart and after some hours it happened again 

Please notice this because over thousands of people are facing this.