i noticed this problem on the first day i installed unifi so i called them up to see if they can solve it and all they told me that the connection was not 'stable' as it was new and ask me to wait at least 24 hours after installation so that the connection is more 'stable' ._.
i went holiday for a week and after i came back i found that the problem was still there.
and today they scheduled people to come to my house and have a look at it.
the guy insisted it was my laptop problem and he said he cleared my browsing history because according to him it was too much that caused those webpages to not load. he told me say after clearing just wait and see if the problem still exist, if it does call them again.
and i was like wth? they were damn lazy ..they wanted to finish it fast so that they can go home!

hmm i tried changing the DNS for the router de and it doesnt work for mi too.
however i tried changing my laptop's one..i think it should be working fine now.. so far so good i suppose..