Exporting CSV with multiple tabs open can export wrong view
If you have multiple issue indexes open and export one to CSV, the tab you most recently opened will be exported NOT the tab you chose to export.
I tested this on the demo Redmine as well. To reproduce:
1. Open a tab of the "Issues" view (tab 1)
2. Export CSV
3. Open a second tab of the "Issues" view (tab 2), apply different filters/options
4. Return to tab 1 and export CSV again
5. Observe that the second export actually contains content from tab 2, not tab 1.