Possible regression caused by removed routes
We introduced subgroups in version 9 which meant our wildcard namespaced routes were unable to guarantee a match to the project name if project is in a subgroup. As part of an ongoing effort in #28848 (closed) we have been deprecating unscoped routes and redirecting to the /-/
scoped routes. In 16.0 we removed the redirected routes as a breaking change.
With Remove legacy project routes (!120720 - merged) legacy routes were removed in %16.0, these were previously deprecated and announced, but there are concerns that some changes are causing problems.
There is a thread in Slack but this is not publicly accessible. This issue is a place to discuss publicly the issues and whether any of the changes should be reverted.
Edited by Sean Carroll