just as i thought; the technician won't be able to solve the issue. because the nature of this issue seems to be widespread, meaning everyone should be affected. so the source of the problem shouldn't come from the user's side (house) but from TM's side. TM should troubleshoot on their side. and with only a particular situation is affected (app store) i highly doubt changing the cable or router would fix it.

i think all Unifi packages are affected.
that's great if it's back to normal. now have to wait and see if the others are experiencing the same or not..