Steps to replicate the issue (include links if applicable):

• Create redirect
• Add 2 redirect tags using Page Curation toolbar. Save.
• Add 1 more redirect tag using Page Curation toolbar. Save.

What happens?:

What should have happened instead?:
All tags should be inside exactly 1 {{Redirect category shell}}

Software version (skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):

• Similar to T323883: Adding maintenance tag to page with {{Multiple issues}} should place new tag inside {{Multiple issues}}