My iPad, depending on which version of iOS it has been on, likes to get really slow and do funny stuff with TRO’s 3145 and 3150. Of course, n several patches it was OK, but recently it has gone back to being painful to swipe from one page to the next. Of course, if I switch to the index view, I can see thumbnails of all the pages and quickly switch between them. Go figure! None of the same issues show up if I look at it on PC.
Tablets are funny, memory constrained beasts, and they can have issues managing graphics-heavy, large PDFs.