Ok, I installed disney+ hotstar app on my Mi Box S. When I try to stream at my house, Taman Bukit Serdang, the app keep loading and lagging, and most of the time cannot stream.

But when I bring the box back to my hometown, the app can be played smoothly, with no issue

Fyi, both houses installed with Unifi 30mbps.

I tried to reset my port couple of times but the problem still keep happening. What do you guys think? The problem is on my box or the internet connection?

My house is high rise apartment, my parents landed

Is there any way to check if my router is having problem?