I cannot scroll down pdfs (only shows first page) on the IPad

Hello fellow Roamans,

I have been using my computer for Roam and now I want to use my IPad.
The problem I have is that pdfs only show their first page, I cannot scroll down more.

If anyone have had this issue or have advice on how to not have such a problem, please tell.

Thank you for your attention,
Have a wonderful day,