Linker regex matching single digit causes bad render for comments and commit messages

Problem

If a Linker is set in FishEye with a simple regex that matches a single digit, like

(?i)[#]*(\d+)

some Comments and Commit Messages, even not matching the regular expression, get rendered as a combination of the string inltokxyzkdtnhgnsbdf.

Steps to reproduce

1. Add a Linker to FishEye like the following:

   <linker><simple regex="(?i)[#]*(\d+)" href="https://www.website.com/${1}" description="Linker"/></linker>
   

2. Add a comment to a review containing only

   "

3. The comment gets rendered as:

   inltokxyzkdtnhgnsbdfinltok 0 inltokxyzkdtnhgnsbdfinltok
   

Workaround

Avoid the Regex to be matched by single digit.
In the example provided is sufficient to remove the *.

(?i)[#](\d+)