stbemu (pro) on Firestick with LG OLED tv - back button not working

I have LG OLED tv and just connected firestick 4k max and and installed stbemu(pro) - I also programmed color buttons on firestick and it works great. My problem is, once I am watching on full screen, I can't go back to menu to select other program using left or back button. I have to completely close the application and restart it - its a pain. Is there any solution for this?

My LG magic remote works on all other application on firestick but does not work on iptv (stbemu), is there anyway to make my magic remote work on it? so I can use color buttons from magic remote too.

Thanks.