When testing I noticed some errors in filtering.
1. As administrator go to Reports -> View Reports -> Stock Status.
2. In the Stock Filter section try filtering data using Region, District, Facility, Facility Type, Full Product Name, Stock Status filters.
3. Notice that it does not affect changes in "Reporting Rate and Timeliness" and "All-Time Reporting Timeliness" tables.
1. Filtering should work properly.