Wiki weird output for date entered in header in Markdown

Following Markdown code # 2013/15/5 23:00 produces following HTML-Output <h1 id="markdown-header-<a href="https://bitbucket.org/repoowner/reponame/commits/2013155" rel="nofollow" >2013155</a>-2300">2013/15/5 23:00</h1> which produces the following Text output: 2013155-2300">2013/15/5 23:00.
Expected output is 2013/15/5 23:00.