404 after solving captcha when trying to edit issue

Summary

I get 404 after solving the captcha successfully when editing issue

Steps to reproduce

(How one can reproduce the issue - this is very important)

Example Project

gitlab.com/librehealth/gci/issues/37

What is the current bug behavior?

The issue doesn't redirect me back to the actual issue -- but somehow 404s...

What is the expected correct behavior?

The save succeeds

Relevant logs and/or screenshots

Happens on Gitlab.com

Output of checks

Happens on Gitlab.com