Just wondering whether this is intentionally.
The “Bugtracker” link on the main site links to:
https://docs.nextcloud.org/server/9/developer_manual/bugtracker/index.html
which in return lists links to several issue trackers of owncloud, all starting with https://github.com/owncloud/.../issues
While at the same time, you have Nextclouds own issues registered at https://github.com/nextcloud/server/issues