- pdf is not centered when opening
- zooming in a pdf seems to move pdf to the left, resulting in the left side being cut off
- scrollbar only allows scrolling to the right
- no way to see the missing parts when zoomed in

assume, the first line of text starts with 
ABCDEFGHIJK
when opening the pdf, A is at the left border
when zooming in, A disappears and now B is at the left border
zooming in further, B disappears and now there's only 
CDEFGHIJK
left
zooming in even further even less of the line remains visible

Reproducible: Always

Steps to Reproduce:
1. open pdf
2. zoom in
3. see left portion disppear gradually
Actual Results:  
growing part from the left disappears

Expected Results:  
pdf remains fully visible until filling window and then scrollbars allow to navigate the whole document