Tivimate doesnt change Resolution

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Hi, Im using Tivimate with my Fire TV Box 4k 2nd generation.
When I want to Look a 4k Movie, Tivi Mate doesnt change the Resolution at my TV.
When I Start a 4k Movie, with Netflix or Amazon Prime, my TV change the Resolution. I already turn on AFR but nothing change. Anyone got a Idea?
 
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