I noticed that filtering by region doesn't work in the Stock Filter section of the Stockouts report. The data in the report aren't filtered after applying the filter.
Log into the application as administrator.
Go to Reports > View Reports.
Go to the Stockouts report.
Select any option in the "Region" drop-down in the "Stock Filter" section.
The data seem to reload but aren't filtered.
Only requisitions from the chosen region should be visible in all sections of the report.