Any way to stop firestick being a network pest?

I had issues with my pihole recently Web interface kept crashing & pi kept crashing I ran pihole -t and saw some errors in my lists So I ran gravity and it’s up and running again.

So I ran tail again just to see if the errors returned They didn’t but I noticed my firestick is hammering Requests, I have Netflix and no UK tv license so we depend on the firestick as we don’t watch live broadcasts.

Now if I block the domains the firestick keeps requesting netflix breaks

Anyone ran into this issue and managed to solve it dealing out so much?