External links configuration does not seem to work (BB-7873)

I tried to create a link to our bug tracking system as described on the page https://confluence.atlassian.com/display/BITBUCKET/Create+a+Link+to+a+Web+Service

It does not seem to work. (Note: there are two comments on the page which also suggest the same).

regex: #([0-9]+)

Replacement URL: http://myserver_com/issues/\1

Account: vayana

Project where configuration attempted: pluto3

Thank you.
Dhananjay