When working on math problems I very often switch between an e-book and the journal. Before the journal appears, the e-book (pdf) page 'blinks' once, instead of going to the journal directly, which would be about twice as fast. It's annoying when I want to remember a formula to enter in the journal. When the journal shows up, I have forgotten the formula and have to go back to the book. I don't know any more if this blinking is 'normal' or if it's a problem with my Edge. Is this normal behaviour?