Some links are not clickable in pdf

Can you please help me how to fix my CorelDraw file that is full of URLs (hyperlinks were not added under the internet toolbar)? After I save it as pdf (web setting plus include links), the majority of the links is clickable, but several of them aren't. Which one is clickable and which isn't seems random to me. My aim is to be able to click all. Attached is a sample: links on the left page are fine while the link on the right page is not clickable in pdf. Any suggestion would be appreciated. url issue.cdr