copy reference shortcut disappeared in 16.6

GitLab recently introduced a useful keybinding: c r to copy the reference to the current issue.

This has stopped working in 16.6.

Steps to reproduce

1. visit an issue on any GitLab 16.6 server
2. hit the c key followed by the r key

Example Project

Example: anarcat/test#1 (closed)

What is the current bug behavior?

Nothing happens.

What is the expected correct behavior?

A little popup on the bottom left says "Copied reference!" or something like this. The reference (e.g. for the above issue, anarcat/test#1) is copied to the browser's clipboard.

Relevant logs and/or screenshots

Not relevant.

Output of checks

This bug happens on GitLab.com

@gitlab-bot label regression reproduced on GitLab.com typebug UX severity3