Yes same issue here but I've come to realize that IE11 mobile is completely unusable for me and probably the worst mobile browser I have ever used. The back issue was jarring but what kills it is not having text wrap when resizing the screen. If I have the browser taking up half the screen, I need to constantly pan left and right to read each line of text (or shrink the page so small the text is unreadable). I quickly realized that although the desktop browsers aren't optimized for touch, they are at least usable.