LibreOffice is interpreting the PDF document as a Draw file while you work on it. That can lead to issues, like objects and text boxes placed in the wrong area.

Adobe Acrobat isn’t the only PDF editor around, and it’s certainly not the cheapest. If you want a low-cost alternative that ...

How to Manipulate PDF Files. Initially created by the Adobe Corporation, Portable Document Format (PDF) allows users to share electronic documents across multiple platforms and retain formatting.

Rotate PDF, Save PDF, Change Page View Layout, Read Aloud, Share PDF, Draw/Add Notes using PDF Viewer in Microsoft Edge.