Please help me with the workflow to understand it better.
Assuming that you are talking about the options on Reader app disappear in soemtime, i believe you need to tap anywhere on the screen anytime it happens and the soft keys will be back on screen.\
I open Adobe Reader, go to Recent tab and press on a pdf document.
It opens and i start scrolling through the pages.
It switches to full screen view and no soft keys menu is shown.
I then swipe from the bottom of my screen and it shows soft keys menu (back - home - tasks or so called "triangle circle square").
BUT, this menu is only show for a very short amount of time, so i'm not able to press back to go back to Recent tab.
So i have to swipe from the bottom again and try to press Back very quickly. Which is very annoying.
Btw, could you please stop mentioning my name in every post. Jive Forums is sending additional notification when your name has been mentioned in the post. It is annoying to get two notifications for a single message (as i already get a notification about your reply).
It seems this has been fixed in the latest update.