Admittedly, I don't have an entune system, I don't use my phone/mp3 player much for music.
So I think I'm missing something........
This seems like it's normal operation to me. You have the random function on.
You hit forward, it RANDOMLY selects the next track.
When you hit Reverse shouldn't it also randomly select a track as long as random is still selected? Doesn't matter if if your going forward or backward in reality you're skipping all around anyway.
As long as random is on, theoretically there should be no pattern or predictability.
And to really bore the audience, check this out.
Can a computer generate a truly random number?