So I found the problem and now everything works fine. In the developer option of Android tv I had to able "force gpu" option. Also I had to use ethernet cable. On wifi it wasn't stable enough altho...
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So I found the problem and now everything works fine. In the developer option of Android tv I had to able "force gpu" option. Also I had to use ethernet cable. On wifi it wasn't stable enough although my router is just 2 meters away.