When pressing the back button to go back to the Live TV guide while watching a show, there’s no button to press to instantly return to what I was watching. I have to go back to that channel and press select/enter. Perhaps making a long-press of the back button to return to the currently playing channel will alleviate the hassle.
Also, when going back to the Live TV guide, I would like it to start at the channel currently playing, not the beginning of the list. (edit: In testing this, it’s actually working, but there may be a bug under some circumstances that returns to the first channel. I will investigate and report what I find.)
