Some PDFs are shown as empty in internal PDF viewer

Problem

I have a problem viewing some PDFs (3 out of 11) in Obsidian. I have attached two screenshots. One shows how I expect it to work and one shows a “problematic” PDF. All PDFs are located in the same folder and do not have any differences that are obvious to me. I am running Ubuntu 22.04 and have installed Obsidian via Snap. I am completely new to Obsidian.

Things I have tried

I have completely reinstalled Obsidian and disabled community plug-ins (no change). I have searched this forum for answers but could not find any.