Quite a number of folks, including myself, find this device looses its pairing and is unable to renegotiate no matter what hoops they go through.
I'm a retired senior hardware and s/w designer and will tell the folks at roku that anyone who thinks that not having a mechanical pwr switch on a device, and relying on a software sequence of hoop jumping button pressing and the like, is doomed to failure eventually. Even ctl-alt-del on a pc does not work every time, and it's now 40 years old as a reboot function.
This device needs a power interrupter switch, to reboot the thing from ground zero, and that would give it a chance to clear up all these problems the device seems to have. Then again, I cant begin to count the number of times I've been called into reviewing a project that had hit a wall where the programmers boxed themselves into a corner by thinking that software was the ultimate way to fix devices that occasionally locked up.