I'm seeing the same issues on my Roku 3 with Netflix plus one other annoying issue: After a show is finished and it starts running the credits, it puts them into a small box in the upper left corner of the display (so they can advertise something else you may like to watch). I used to be able to navigate to that box and click it to bring it back and then hit the skip back button to view the credits I missed while futsing with it. Now, however, after I skip back, it just does the same thing again - puts the credits up into a little box. I tried several times and was never able to see the beginning of the credits.
I finally gave up and put my Roku 2 back in place. It's an older interface (and crashed a lot, as I remember) but at least I can see the credits at the end of a show/movie.