Hmm. I wish I could help but I play on PC. It took me FOREVER to figure out how to go back too though and it took a lot of finagling to figure out that I had to right click on the screen somewhere.
That said, I've also noticed that I need to save regularly - because sometimes yeah, there's a bug or something where if I try to view my stats, or another one of my tabs in the menu - mostly stats, but I think one other as well... kinks maybe... it just. Will not let me leave. You can hit the "backspace" button (in my case the right click) all you want but it just shifts between those tabs and there is no way to return to the game unless you load a previous save. I lost a good few days' worth of progress that way and ever since then I save literally every single time I enter a city, sleep for a night, or finish some sort of quest haha.
I'm sorry you're having that trouble too! Hopefully there's a fix for it. ^^