Screen freezes with every change made in the PDF with Quick tools
Every change made with quick tools or tool bar freezes the PDF, takes 10 seconds and then blink screen once before allowing other changes.
For example, If I want to highlight a text. I move over it with my cursor and it shows me the highlighted text. The screen freeze for 10 seconds, blinks and only then will it let me scroll down or choose another option or allow another highlight.