In discussions, use tag to filer topics. The paging doesn't work properly and only show first page with 10 topics even there are more than 10 topics exist.
Step to reproduce:
1. Create 12 topics with same tag "test" applied.
2. Go to main discussions page
3. Choose a "test" tag to filter topics.
Expected result: 12 topics shown through 2 pages. 10 topics per page.
Actual Result: only 10 topics shown in first page and no paging is available.