Bad URL serialization to Forgot username/password

STEPS TO REPRODUCE

1. Click Log-in
2. Click 'Forgot your username?'
3. Click Log-in again
4.  Click 'Forgot your password'

EXPECTED RESULTS

The user is directed to http://<server>/xwiki/authenticate/forgot and respectively http://<server>/xwiki/authenticate/reset pages.

ACTUAL RESULTS

The pages are non existent.

The issue reproduce on subwikis and on tomcat with Docker, but not on jetty/hsqldb XS distribution since it's configured to use /xwiki/ by default.