How to enable Roku Remote App to work?

We have Roku smart TVs connected to our Pepwave Max Transit Pro. When we try to use the Roku iPhone/iOS app to remotely control the TVs the app is never able to find the Roku TVs on the network, even though the TVs and the iPhones are all connected to the same SSID provided by our Pepwave. Is there a setting I can change to allow this communication on the internal network?

I use the app and I haven’t had this issue. Is the app and the roku on the same ip range?
Can you ping from the iphone to the Roku?

no issues here, did you enable client isolation or some other security setting?

Good point, client isolation could do it.