Comment links when using the /comment/1234 path error 404

[mdesmedt]

Describe the bug

Comments I make on my Lemmy instance appear to have two formats:

1. mysite.org/post/1234/comment/5678
2. mysite.org/comment/5678

The former resolves fine on my server, but the latter gives a 404 error. Federated comments link to the /comment URL so all links to my comments from remote instances produce a 404.

Context

• Hardware: VPS with Debian 11
• YunoHost version: 11.1.21.4 (stable)
• I have access to my server: SSH & Web
• Are you in a special context or did you perform some particular tweaking on your YunoHost instance?: no

Steps to reproduce

1. Go to a post on a lemmy_ynh instance
2. Post a comment
3. Click on the "Link icon" button and observe mysite.org/post/1234/comment/5678 works
4. Now click on the "Fediverse icon" button and observe mysite.org/comment/5678 produces a 404 error

Expected behavior

Both styles of links should work.