This is only a tiny annoyance, so please file this all the way at the back of the to-do list, but I noticed this bug so i might as well file it.

Steps to reproduce:

- Open a PDF within zotero
- Set the view to split either horizontally or vertically
- Scroll to make sure both sides show different pages
- Restart zotero and open the tab with the split view
- Here's the bug: Both views now show the same page