I have created links to attached pdf files using Adobe Pro official version on my laptop and 'Go to page' option and set the link on the first page of attached PDF file and in Action tab set 'open in new window' so that my main PDF list should remain open. Now this mobile app on my K 20 Pro android smartphone is not opening said links. Even said links are not recognised. It shows attachments but don't open links in mobile. Same links are working in laptop and even on other desktop. It is a basic feature of PDF reader. It must work, at least for documents which are created using its own paid version. Kindly do the needful.
Other third party free apps are opening them. I think it may be because pop up permission is not obtained by this app.