I have opposite problem: WiFi Remote for Ultra 4K, and another "simple" remote with Premiere Streaming Media Player. It seems that both remotes use the same infrared signaling (Ultra's undocumented?), and I have to point the Premiere "down" for the lower TV to keep the upper TV with the Ultra from getting the signal even though I have it set to use the WiFi for remote commands, and I can point that one anywhere BUT towards the Premiere.
Is there no unique pairing for both IR receivers, or at least a way to disable it on the Ultra's remote?