I have been facing this issue for a while and as I can see many of you are suffering from the same issue and no one is coming up with the solution.
I had found the solution and thought of sharing it with you all.
So friends, the reason it's happening is because of the 'DOS protection' feature
Because of that it's blocking some of the device's access to the Internet for some reason.
Just by turning DOS protection off, this problem will be resolved.
And you can surf the Internet without getting blocked.
I hope this will help you all.