Hi,
I have Roku 3 device and the remote is failing to control the private listening volume. The private listening feature is not available on the Roku Android app for this device. What is my best option for private listening for the Roku 3 device.?
I'd try pulling/replacing the batteries and making sure it re-pairs correctly.
https://www.hellotech.com/guide/for/how-to-pair-roku-remote
Otherwise you'll probably need to replace the remote or get a newer roku model that works with the app.