Filtering issues by label doesn't work with paging

[DuckDuckWhale]

• Gitea version (or commit ref): 1.13.0
• Git version: 2.25.1
• Operating system: Ubuntu Server 20.04 LTS
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL)
  • No
  • Haven't tried
• Log gist: N/A

Description

On the per user issues page, when clicking on a label with less than a page worth of tagged issues, it still shows multiple pages at the bottom and the next page button still works, but when clicking on them the results won't be filtered by the label anymore.