If you are experiencing the issue when you try to change a channel using Up arrow key on your box remote and instead of navigating to next channel on the list it goes back to the first channel on the list.
A new firmware V16.74 will available shortly via Update by Network menu. After updating this issue will be solved. If you still experience the same problem please do a factory reset in Tools menu. But after reset you have to update the channel list and others settings as reset will delete everything from the box.